How To: Make Aspirin from a Willow Tree

Make Aspirin from a Willow Tree

In this article, I will be showing you how to make a crude form of aspirin from the bark of a willow tree. It is a great remedy for headaches, hangovers, and other minor pain. The use of the willow tree as a mild pain reliever goes back to the Native Americans, who used it in much the same way that I do.

Before we go any further, I am going to explain what we are making and how it differs from commercial aspirin. Commercial aspirin is a chemical called acetylsalicylic acid (say that one three times fast!). What we will be making is simply an herbal tea that contains salicylic acid, which is the raw material from which acetylsalicylic acid is made.

So, why do they convert it from the raw salicylic acid into the commercial form? Two reasons:

  1. It increases the shelf life of the medicine.
  2. Salicylic acid becomes dangerous to use if you concentrate it.

Pharmaceutical companies are not happy with just picking a leaf or cutting some bark from a tree...they like to concentrate everything and make it as potent as they can. If you do this with salicylic acid, it can cause stomach bleeding. But, as long as you use it in a natural, unconcentrated form (like the willow-bark tea we are going to make), it is perfectly safe. I have used it for years with no ill affects whatsoever.

So, now that you know what we are making, we can get to the process of making it.

Step 1: Learn to Identify Willow Trees

One little thing about herbal medicine to remember: If you have any doubt about the identity of a plant, don't use it. NEVER use a plant medicine unless you are 100% sure you have the right kind of plant. Using the wrong kind of plant can result in illness and/or untimely death.

There are basically four types of Willow trees.

The Weeping Willow

The Black Willow

The Golden Willow

The White Willow

I believe this contains the most salicylic acid.

This is the species I use most of the time because it is very easy to find. As you can see from the picture, it always grows near the water. Also, I was told by some Cherokee folks that this kind of willow contains the most medicine. All the research I have done since then seems to confirm this.

All these species of tree contain the chemical we are looking for, in varying amounts. Although the white willow (or "creek willow" as some people call it) is the most potent, all of them will work.

So, how do you identify it for sure? well, first you will need to look at the leaves. They should look about like this:

Some of them are a little thicker, like this:

Now examine the bark. It should look something like the pictures below:

Images via,,

Now, at this point, I would break off some of the leaves and smell them. This is because I have used this plant for many years and I know its smell very well. You, however, do not know the smell that we are looking for. So, here's what I want you to do:

  1. Grab a handful of leaves, crush them up some, and smell them. I don't just mean take a quick sniff, I mean really take your time and make yourself familiar with that smell.
  2. Take pictures of the tree, and take some of its leaves with you.

Once you have done this, you are ready to verify the identity of your tree. The best way is simply to take your pictures and your samples to a professor of botany. If there is a university in your area, this should be no problem. If not, you can always email your pictures to the nearest one. If you are new to the study of plants, do not neglect this step. As I said before, ingesting random plants is a good way to die.

Once you have gotten a positive ID from an expert, you should be able to identify willow trees yourself from then on. Remember the smell particularly, as this is the best way I have found to identify a willow tree, even in winter when the leaves are gone.

Step 2: Cut a Square of Bark

Once you are absolutely sure that you have found a Willow tree, you are ready to harvest the bark. Like all trees, the willow has an outer bark and an inner bark. The inner bark is what we want.

So, get a good sharp knife out and cut a square into the tree:

Make sure to cut it good and deep. Remember, you are trying to cut through both the outer bark and the inner bark. Go over your lines a few more times with your knife and deepen the cuts. If your knife has some saw teeth on it like mine does, this is a good time to use them.

Now, stick the point of your knife into one of the lines and gently pry outward.

Go around the whole square, gently prying outward so as to gradually pull your square away from the rest of the tree.

Remember not to pry too hard. If you do, you will just make the bark fly off in chunks, scattering the material that you are after. Instead, you want it to come off in one or a few large pieces.

So, keep going around the square, prying a little farther each time, until finally your square starts to come loose in the desired fashion.

Now, just keep doing what you've been doing. When three sides are lifted free, you can just peel it like this:

Notice that some of the bark is white, and some of it is pinkish. The pinkish bark is what we want. As you can see, my square has come off in two pieces, which is fine. Now let's just cut the last side off:

At this point, I still have some little shreds of pinkish bark clinging to the tree.

Of course, these need to be cut off as well. Cut or scrape off all the pinkish bark you can see. Here is what I ended up with:

Two big pieces and a few little shreds. Here is what the tree looked like:

Now, just in case you think that I have terribly damaged this tree, let me enlighten you. This little scar will heal rather quickly, and will not do any lasting harm to the tree whatsoever.

In case you don't believe me, check this out. This is a willow tree that I cut a square from, about six months ago:

As you can see, it is already healing up nicely. It has an ugly scar, but in time that will also be gone.

While we're on the subject, I want to talk about sustainable harvesting. When taking materials directly from nature, it is vitally important not to use more than you need. It is also vitally important to avoid destroying the source. In this case, you can avoid doing any harm to nature by following these two simple rules:

  1. Never take from the same tree twice in one year. In other words, whenever you take a square from a willow tree, you should not go back to that specific tree again for another year. This gives the trees time to heal themselves so that the stress upon them is minimized.
  2. NEVER cut a ring all the way around the bark. Just take a square about as big as your palm, that is all you need for a single dose. If you take too much bark at one time, it can kill the tree. If you cut out a ring around the tree, it will definitely kill it.

Now, just wrap your pieces of bark in a napkin and head home.

Step 3: Making Willow Tea

This is, of course, a very simple and basic thing. First, put your pieces of bark on a coffee filter.

Now wrap it all up in a nice little bundle. Put this bundle on top of another coffee filter.

Wrap it up again, and secure it with a bread-bag tie.

You have now created a teabag. You don't really have to use two coffee filters, but I do. One filter will do it, but two will do it better.

Now, you just throw your teabag into a pot of boiling water just like any other teabag.

Stir it periodically, and keep an eye on the color of the water. It will slowly begin to take on a deep reddish-brown color, almost like the color of blood.

After about 20 minutes, the tea should be ready. Don't overcook it or you will burn the medicine out of it. Once it is done boiling, let it steep a few minutes.

Now you just have to filter out any remaining solids. There are many ways to filter a liquid, of course, but this is the way I do it.

First, I get my filtering screen. This was half of a device called a "tea ball":

It's just a fine metal screen. If you don't have one of these, a small cup with holes poked in the bottom will also work. I like this thing, though, because it fits neatly into a glass like so:

Once again, if you don't have anything like this, just put a small cup inside of a bigger cup, and make sure the smaller cup has many small holes in the bottom. I'm sure you can figure that out without a picture.

So, now we put another coffee filter into the screen:

And slowly pour the tea onto the filter as shown:

Pour it slowly so that it doesn't get clogged. If you think the filter is clogged, lift up the filtering container and look for the drip:

This one has stopped dripping, so I need to take the coffee filter in my hands and squeeze the liquid out, so that it drips into the glass.

Once you have squeezed all the liquid out, change filters and keep going until all the liquid has been filtered into your drinking glass. All you have to do now is add some sugar (if you want to) and drink the stuff.

You might be surprised when you find out that it tastes pretty good.

That's all there is to it. You just identify your tree, cut out a square of bark, make tea from it, and drink it.

As I said, this tea is excellent medicine for minor pains. I wouldn't recommend using it too often, as you can build up an immunity to it. I also would not recommend drinking more than one glassful at a time. As I said before, salicylic acid can be troublesome if you take it in large quantities, but you don't need to take it in large quantities, anyway. This one glass should be all you need. Of course, this crude aspirin is not that strong, as painkillers go.

If you are experiencing truly severe pain, this treatment probably won't make it go away (although it will probably help). This treatment will provide quick relief for minor aches and pains, just like its commercial counterpart, but it has the advantage of being 100% free and 100% natural.

I hope this little pearl of wisdom will be helpful to all of you in the future, when dopeheads have made it impossible for honest folk to get pain medicine.

Just updated your iPhone? You'll find new features for Podcasts, News, Books, and TV, as well as important security improvements and fresh wallpapers. Find out what's new and changed on your iPhone with the iOS 17.5 update.


Willow Aspirin

I only have one question. When is the best time to harvest the Willow Bark? Is spring time the best when the sap is coming back into the tree?

This is a Wonderful site and I am glad to find you!
Thank You

Theresia ... if you know anyone who does reiki, that will you with your situation.

Please. Never harvest bark in the way this article claims. By harvesting bark from the trunk of a live tree opens it up to disease and infection, eventually killing the whole tree. He got lucky with the one he harvested, but this is terrible practice and not respectful in any way.

Bark can be harvested at anytime of the year, though spring and fall are optimal.

If you want to harvest Willow please use the branches which can be cut into pieces and dried on a screen. I am a certified herbalist and forest farmer, please don't listen to this articles ignorance.

Thank you Dustin for the great article. I have one willow tree near by and I followed the instructions. I debarked the bottom portion of the willow tree. You are right the bark does grow back. I was able to make a few ounces of the tea. Works great.

I totally agree with your last statement about the druggies making it difficult for people in real pain to obtain pain medicine. I have Fibromyalgia, Arthritis, & back issues, & a few months ago, went off all Rx meds, partly due to the DEA cracking down on pill mills & prescription abuse here in Florida made it nearly impossible to get even my Percoset, which my daughter said is not even really desired that much in the drug community because it's not strong enough, & contains high acetaminophen levels. Also, my pain doc was an ass, & I was experiencing stomach issues, causing me to drop from 140 to 106 in a matter of a few months. So now, I am researching every possible natural Tx for pain. I am also gonna setup a small Aquaponics garden so I can grow some of my own produce, & maybe some eatin fish. My question is, did that piece of bark make just that one glass though? I'm wondering if maybe I should just buy some White Willow capsules, & go that way. Also, gonna try the Morphine Bomb made with food-grade essential oils. A lot of people say it works.

We are told not to give aspirin to babies and small children. I presume the same applies to salisylic acid from willow bark? If so, a warning about this should be mentioned because a lot of children have a sensitivity to it.

Does anybody know of an antidote to salisylic acid that could prevent the consequences of a flare-up?

Are you able to vac seal the bark for use later?

My past readings all indicated using branches two years or older as opposed to the main trunk. You still get the pink inner bark and I think it will do less damage to your tree, and you can harvest as you need it a bit more often then using the limited space on the main trunk. I have tried it in the past and it has worked as a mild pain med. and anti-inflammatory

what are your thoughts on this?

well, I live in an area where black willow and white willow are very common, so I have never really had to worry about finding willow bark. That is why I recommend never taking from the same tree twice in the same year. It only takes a small square to make one dose, and the tree will repair it relatively quick. Within one year, you will barely see a scar. Personally, I only drink this stuff occasionally, when I feel sick or have a really bad headache, so I don't have to cut from a lot of trees.

You can certainly use branches, and if you have a need to go back to the same tree repeatedly, that is not a bad way to go. However, I have found that the dose is not as strong when made this way, and seems to require more tea for the same effect.

Really though, if you want to make a bunch of this stuff, dig up a root and use that.

For the love of God... Take this post down. NEVER NEVER NEVER harvest bark from the trunk of the tree. When you do this, even a small square opens up the tree to disease and infection. Just because it healed this time doesn't mean it will next time. And just because they're "common" in your area doesn't give you a right to harm it for no reason. If you're going to put this information out into the world for susceptible people who don't know any better please I'm begging you, do your research. If you truly want to be a steward for the land and harvest it's medicine you need to do so with respect.

I am an herbalist and forest farmer, if you want to harvest Willow medicine, use the branches. They have just as many chemical constituents to give you what you need. I hope people read this comment before going out and butchering their local Willow trees. This is unacceptable and the reason why inexperienced wildcrafters have been such a detriment to the environment.

Please do not harvest willow bark this way.It is unnecessary to take the bark from the trunk.It does cause damage when all you need to do is simply take a branch! Thank you

I used to have a few planters warts and had them removed by a dr numerous times which didnt help. I went to a medicine women and she got me 2 do this exact thing boil it cool it and soak my foot in it twice a day for 30 minutes for 1 week and my planters warts slowly turned black and fell off. Told numerous people about it and it worked for them as well.

I was so with this article till the label dope heads showed up. Those who use topical creams and ointments and roll ons made naturally from

THC are not getting anything in their heads. What they are getting is natural medicine that also has a long history with man, longer than that of aspirin perhaps. And it is near instant and why should the medicinal choice of one be a problem for anther? I would not say this unless I personally tried it. IN an attempt to find natural medicine that would take care of the pain of my daughters bulging spinal discs I purchased the smallest tube of roll on pain killer and it instantly took her very big pain away while doing nothing to her head. I take commercial white willow bark as a heart attack prevention. I enjoyed this article so much but Id sure like to see some update their attitude on medicines that are natural, create no recreational benefits but are incredible at taking care of pain without harming the body.

I wasn't referring to THC when I said dope heads. I was referring to drug addicts who abuse prescription drugs. Then the drug companies and doctors, wanting to do something about the addiction epidemic, start restricting the use of these medicines. This means that it is harder for pill heads to get their dope, but it also makes things hard for those who genuinely need such medicines.

I think marijuana should be legal because, unlike opiate pills, it has never killed anybody.

Why damage the whole trunk of a tree if you could use bark from a few smaller branches? Common sense?

You don't need to damage the whole trunk, as you are only cutting out a small piece. If you use bark from the smaller branches, it will not yield as much. I tried it. Also, the article says that you should never take twice from the same tree in the same year. And if you live in an area where willow trees are not common, this is not worth doing anyway.

Thank you for this. I look forward to making it. I would also like to mention that in keeping with the Traditional way of the Native Peoples, offering tobacco in exchange for the Willow Bark need be done first.

This is great. The willow was used in saxon times as well. My great grandmother used to add some slippery elm (bark?) as this made it easier on the stomach.

Hi Jennifer. Please. Never harvest bark in the way this article claims. By harvesting bark from the trunk of a live tree opens it up to disease and infection, eventually killing the whole tree. He got lucky with the one he harvested, but this is terrible practice and not respectful in any way.

If you want to harvest Willow please use your pruned branches. You can cut them up into small pieces and dry then on a screen. Once dry they will keep for a few years and you can make them into tea whenever you want. I am a certified herbalist and forest farmer, please don't listen to this articles ignorance.

When big pharma extracts the active ingredients they ignore the natural side-effect buffers that are present in almost all medicinal plants. The extracted substances can be altered and patented, that's how they make their money. So, why don't they include the buffers? So they can sell you another product to cure the disease caused by the active ingredients. Sad.


So true. And that is why so many people like myself, have gone to a more natural means, I have been doing herbalism for ohh 30 some odd years.

Is there a way to store this for long term use like Canning or freezing?

I believe it can be cut into small pieces and dehydrated and stored in a jar or airtight container. I have stored which hazel and Sassafras as well as mulberry in that fashion with no problems.

Or, you could just buy a bottle of aspirin at the pharmacy.

I Thank you for this Info! Great Article!. I remembered my grandma used to tell me something about willow and thought it was the root used as in Sassafras root tea, which is good for the soothing of the stomach and nerves, great if you have the "shakes" as in parkinsons". Can willow be used with the sassafras?

Thank you for the compliment. And yes, I do believe you can use it with sassafras without any problems. I have also heard of people using that combination of herbs in a tea. Also, I am glad you brought up the use of the roots, because I forgot to mention that you can use the root of a willow tree instead of the inner bark. In fact, if you want to make a large amount, the root would probably be better.

Thank you so much for sharing your knowledge and experience. I am trying to become Self taught in natural remedies and this is a wonderful resource.

I do have a question. I have a weeping willow that I planted 2 years ago. I have since learned that for it to grow well, I must prune it yearly. I hate to waste any bark from the limbs I trim and I hope to harvest what can be used and preserve it in some way.

We have a freeze dryer. What do you think about me freeze drying the pinkish bark from the trimmed limbs? I believe the freeze drying process will make the bark very brittle perhaps to the point it'll make a fine powder that can be steeped later.

Hi Paula. Please. Never harvest bark in the way this article claims. By harvesting bark from the trunk of a live tree opens it up to disease and infection, eventually killing the whole tree. He got lucky with the one he harvested, but this is terrible practice and not respectful in any way.

If you want to harvest Willow please use your pruned branches. You can cut them up into small pieces and dry then on a screen. Once dry they will keep for a few years and you can make them into tea whenever you want. I am a certified herbalist and forest farmer, please don't listen to this articles ignorance.

Native Americans couldnt have used the White Willow for long as it is an invasive species in the US, however, our European ancestors have used this tree for pain reief for thousands of years going all the way back to our Neanderthal forebears. This tree has some serious medicinal history.

Share Your Thoughts

  • Hot
  • Latest