Comfrey medicinal uses: are you already familiar with comfrey, also known as “knitbone”?
Here’s what you’ll discover in this post:
A deep dive into common comfrey medicinal uses and wild comfrey medicinal uses
Safe DIY home remedies like comfrey salve recipe and comfrey tea
Answers to all kinds of questions like is comfrey poisonous, is comfrey edible, is comfrey a perennial, and more.
And if you’d like to check out one of the most in-depth articles on the site, explore this guide to natural remedies for lip cold sores.
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1. What Is Comfrey (Symphytum officinale)?
Native to Britain and stretching across Europe and into Siberia, wild and garden comfrey has been recognised since ancient times for its healing powers.
In fact, Symphytum comes from Greek words meaning “grow together plant” because it was used to knit broken bones.
Comfrey grows fast—up to four feet tall—with fuzzy leaves and bell-like flowers in purple, blue, pink, or white. It is a hardy perennial that comes back each year.
2. The Science Behind the Healing
Let’s take a quick look at the science:
Allantoin stimulates cellular mitosis (new tissue growth).
Rosmarinic acid relieves pain and inflammation.
Comfrey is rich in mucilage, vitamin C, calcium, magnesium, polyphenols, phytosterols, and triterpenoids
A large 2013 review on medicinal uses for comfrey reports:
“It is clinically proven to relieve pain, inflammation and swelling of muscles and joints…sprains, contusions and strains after sports injuries”
It’s no wonder comfrey tablets were once standard in World War II first-aid kits. They sped up healing of bones and wounds—and helped soldiers recover faster.
3. Comfrey Root vs. Leaves: What to Use When
Have you ever wondered what can comfrey be used for?
Leaves are gentle. They’re perfect for soothing cuts, scrapes, stings, and applying to skin. Making a comfrey poultice with leaves is easy and effective.
Roots are richer in mucilage and excellent for deeper healing, especially for “hot/dry” conditions like old injuries or deep bruises.
Both parts are powerful.
4. Top 5 Comfrey Medicinal Uses
Comfrey poultice for bruises, sprains, and skin wounds
I mash a handful of leaves, place directly on the injured area, cover with a cloth, and leave for a few minutes or hours. It speeds healing and eases pain fast.
Comfrey salve/comfrey oil uses for joint pain, arthritis, varicose veins
I infuse dried leaves or roots in olive oil, strain, and mix with beeswax (or vegan wax). It’s magic on sore knees or swollen veins—especially if used consistently for two weeks.
Comfrey tea for mild internal use
Only for occasional use and never during pregnancy or in children, or those with liver issues. Do your own research before using comfrey internally. I steep dried leaves (not roots) for about 5 minutes. It soothes ulcers, cough, and lung irritation.
Comfrey baths & compresses for skin irritations
A warm bath with comfrey leaves or a compress on sunburn and rashes soothes instantly thanks to its natural mucilage.
Comfrey uses in the garden
Beyond medicine, comfrey is a gardener’s friend. I use the leaves as mulch or compost. They’re loaded with potassium and nitrogen—perfect for heavy feeders like tomatoes.
Fertiliser? DIY comfrey “compost tea”!
And pollinators love the flowers—those bell-shaped blooms feed bumblebees and butterflies.
5. Ancient Roots & Healing Legends
Stories of comfrey medicinal uses go way back:
Pliny the Elder in Naturalis historia recommended comfrey for bruises and sprains as early as 23–79 AD. He even mentions using root decoctions in wine as an emmenagogue.
Dioscorides, Nero’s physician, touted comfrey in De Materia Medica for broken bones and gastrointestinal problems.
In medieval Wales, a bone “union potion” combined comfrey, wine, pepper, and honey for nine days to strengthen broken limbs.
Monastery herbals from 1000 AD mention its use for “internal bleedings, ruptures, and hernias.”
It was so trusted, people even made comfrey cast-like bandages to hold bones in place while they healed.
6. How to Make a comfrey salve recipe
Here’s my easy comfrey salve recipe—perfect for gifting and keeping at hand:
Ingredients:
- 1 cup dried comfrey leaves or chopped root
- 2 cups olive oil (or avocado oil)
- 2 tbsp beeswax/vegan beeswax alternative
Instructions:
- Gently heat comfrey and oil in a double boiler for 2–3 hours.
- Strain leaves/root.
- In sauce pan, melt wax, stir in infused oil.
- Pour into jars and let cool.
Use it to soothe sore muscles, arthritis aches, or skin irritations.
This homemade comfrey salve blends comfrey oil uses, comfrey salve benefits, and comfrey uses for skin in one jar!
7. Safety First: Is comfrey really toxic?
Comfrey contains pyrrolizidine alkaloids (PAs)—which may potentially harm the liver if ingested long term.
There is a long history of people using it internally long term with no ill effect, so the issue is not clear-cut.
Please do your own research before deciding whether to use comfrey.
I never use it internally for long term—just in moderation, with occasional leaf tea.
I don’t use it during pregnancy, breastfeeding, or on young children.
Some people recommend limiting topical use to 10 days at a time.
So yes, is comfrey safe? Yes—if used thoughtfully, with respect and caution.
8. Growing Your Own: Comfrey plant benefits in the garden
Gardens thrive with comfrey—it’s hardy, attractive, and useful:
Is comfrey a perennial? Absolutely, it returns every year.
It tolerates mowing, partial shade, and poor soil.
Flowers from late spring to summer feed bees.
It can become invasive, but you can control it with deep border beds or large containers.
You can grow the Bocking 14 variety to avoid spreading seeds.
You can harvest leaves whenever needed, chop them for compost, or dry them for tea and remedies.
9. Real-Life Healing: Herrick Kimball’s Story
YouTuber Herrick Kimball once treated scratched eyes with a comfrey leaf poultice. After 30 minutes, he said:
“It was like I had never had anything wrong with it. It was 100 percent cured.”
10. Comfrey in Modern Studies
Modern evidence backs ancient wisdom:
European clinical trials confirm comfrey balm reduces pain and swelling in backache, osteoarthritis, sprains, contusions, and muscle pain—and works as well as NSAIDs like diclofenac, with good tolerability pmc.ncbi.nlm.nih.gov.
A 2024 rat study showed comfrey speeds wound healing and encourages new tissue growth cdn-uat.mdedge.com+15healthline.com+15researchgate.net+15.
Lab studies show allantoin and rosmarinic acid promote skin repair and reduce inflammation at a cellular level rxlist.com+8pmc.ncbi.nlm.nih.gov+8indigo-herbs.co.uk+8.
That’s why common comfrey medicinal uses remain so powerful today.
11. FAQs
Can comfrey heal tendons?
Yes. Its anti-inflammatory and pain-relief properties support healing inflamed tendons.
Is comfrey oil good for hair?
Possibly. Rich in gamma-linolenic acid and omega-6 fats, it may support scalp health and hair growth.
How long does comfrey take to work?
Many people see improvement within 1–2 weeks of topical use for sprains or arthritis, although there are lots of tales of even speedier results.
Is comfrey good for varicose veins?
It can help reduce pain and swelling when used topically in poultices or in comfrey oil or creams.
Does comfrey tighten skin?
Thanks to allantoin boosting collagen, it can improve skin firmness and smooth rough patches.
Is comfrey the same as borage?
They’re in the same Boraginaceae family, but comfrey is Symphytum – not true borage.
What does comfrey taste like?
Mild but slightly bitter.
Is comfrey poisonous to dogs?
As with humans, regular consumption is not recommended due to safety concerns.
Is comfrey edible?
Young comfrey leaves can be eaten raw or cooked (they’re hairy, so chop finely). Roots can be roasted and used like coffee. But long-term internal use is discouraged due to potential toxicity.
Is comfrey invasive?
Yes—it regrows easily from root fragments. Plant with care or grow in containers.
Is comfrey a perennial?
Yes, it lives for many years and returns each growing season.
What can comfrey be used for?
Healing skin, bones, muscle aches, garden fertiliser, poultices, salves, teas, and more.
Is comfrey really toxic?
It is safe when used topically on intact skin and not taken long-term internally.
Comfrey uses in the garden?
Mulch, compost, fermented fertiliser, and pollinator support.
Common comfrey medicinal uses?
Bruises, sprains, arthritis, wounds, skin irritations, and bone support—backed by research.
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Comfrey medicinal uses: final words
We’ve covered the power of comfrey medicinal uses—from soothing salves and healing poultices to garden compost and safety tips.
You’ve learned how to use leaves vs. roots, why it works, and how to grow it.
For every ache, bruise, irritation, or garden chore—comfrey is ready to help.
Let me know in the comments if you have any questions or want to share any information about comfrey.
Was told comfrey would help my chronic congested lungs better than mullein and even promote new tissue.Is this true?
Hello Daniel, thanks for getting in touch.
I can’t say for sure if comfrey would work better than mullein in your case, but it’s definitely possible and may be something you wish to experiment with.
Have you tried mullein yet, and has it helped at all?
Comfrey leaf tea is indeed said to be rejuvenatory to lung tissue, and to many other types of tissue throughout the body. But I err on the side of caution and don’t generally recommend using comfrey leaf tea long-term due to the pyrrolizidine alkaloids, which may risk liver damage.
Some herbalists are not so concerned, as comfrey has been used by many people long-term without evidence of liver damage in those cases. But many herbalists now advise against the use of comfrey internally.
If you decide it is worth the risk, I would advise getting in touch with a herbalist/naturopathic doctor who uses comfrey internally if possible for more personalised guidance, or doing further research on which types of comfrey leaves have less pyrrolizidine alkaloids, etc. You may also wish to experiment with using comfrey externally as a poultice on the chest.
Wishing you well, Rosa