Herbs for Skin Issues: What the Evidence Actually Supports

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A small number of plants have real evidence behind them for skin problems. Aloe gel appears to speed burn healing. Diluted tea tree oil modestly reduces acne lesions. Most of the rest of the traditional list sits somewhere between promising-but-untested and actively dangerous — and a few plants that still show up on old herbal skin lists can land you in the hospital.

That gap is worth understanding before you rub anything on a rash. Below, the common herbs for skin issues are sorted by how strong the evidence really is, what you can reasonably expect, and which ones to leave alone.

One thing to settle first: your skin is not a filter for “toxins in the blood.” Skin problems come from a damaged skin barrier, immune reactivity, infection, hormones and sun exposure. Herbs sold to “purify the blood” are aimed at a mechanism that isn’t there. The ones that do something work locally, on the skin, and work modestly.

Which herbs for skin issues have evidence — at a glance

Herb (topical unless noted)	Most-studied use	How strong is the evidence?
Aloe vera gel	Burns, minor wounds	Reasonable for burns; limited for acne; not enough for eczema
Tea tree oil, diluted	Mild acne	Positive but low-quality
Calendula	Wounds, irritated skin	Mixed — animal data stronger than human
German chamomile	Irritated, inflamed skin	Traditional use; little rigorous human data
Oregon grape (Mahonia)	Psoriasis, dermatitis	Small studies, consistently positive
Indigo naturalis	Plaque psoriasis	One small placebo-controlled trial
Evening primrose / borage oil (oral)	Eczema	Good evidence of no benefit
Oleander, foxglove, pokeweed, greater celandine, comfrey (oral)	—	Avoid — documented serious harm

The herbs with the best case

Aloe vera gel — burns first, everything else second

Aloe is the closest thing to a reliable herbal skin remedy. Clinical research suggests topical aloe gel may speed the healing of burns and reduce burn-related pain, and two small studies found aloe gel combined with other treatments improved acne [NCCIH aloe vera fact sheet, 2025]. Smaller bodies of research point to possible benefit for genital herpes, lichen planus, psoriasis and skin damage from radiation therapy.

Where it runs out of road: NCCIH lists eczema and diabetic foot ulcers among the conditions where there simply isn’t enough reliable information to say whether aloe helps. Topical use is generally well tolerated, though burning, itching, rash and eczema have been reported occasionally. If you want the practical detail on preparing and using the plant, the guide to the aloe vera plant covers it.

Swallowing aloe is a different proposition entirely. Oral aloe latex causes abdominal pain, cramps and diarrhea; oral aloe leaf extracts have been linked to cases of acute hepatitis after anywhere from three weeks to five years of use; and the International Agency for Research on Cancer classifies non-decolorized whole leaf extract of aloe vera as a possible human carcinogen [NCCIH, 2025]. Stick to the gel, on the skin.

Tea tree oil — real but small effects on acne

A 2015 Cochrane review of 35 randomized controlled trials involving 3,227 participants found low-quality evidence from single trials that topical tea tree oil may reduce total skin lesions in acne. The same review found no evidence supporting other complementary approaches — herbal medicine generally, acupuncture, wet cupping — and the American Academy of Dermatology’s acne guidelines say the data are too limited to recommend herbal therapies [NCCIH clinical digest on skin conditions, 2021].

Two practical points. Tea tree oil contains 1,8-cineole, a skin irritant, so products high in it can cause irritation or contact dermatitis; and oxidized oil — an old bottle that’s been open a while — triggers allergy more readily than fresh. It should never be swallowed. Poisonings, mostly in children, have caused drowsiness, disorientation, rash and unsteadiness [NCCIH, 2021].

Calendula — genuinely mixed

Calendula is one of the few skin herbs to get a proper systematic review. Givol and colleagues examined 14 studies — seven animal experiments and seven clinical trials — and found animal work gave moderate evidence for faster resolution of the inflammatory phase and more granulation tissue. The human results were less tidy: a randomized trial in people with partial-to-full-thickness burns found no benefit over controls, and of two trials on radiation-induced dermatitis, one favored calendula over trolamine while the other found no improvement over an aqua gel cream. The reviewers called for larger, better-designed trials [Givol et al., Wound Repair and Regeneration, 2019].

So: plausible, occasionally helpful, not proven. Calendula is in the daisy family, which matters for allergy — more on that below. The detailed calendula profile covers preparation methods if you want to try it.

German chamomile — traditional, thinly tested

Chamomile compresses have been used on irritated and inflamed skin for centuries, and the plant contains compounds with anti-inflammatory activity. What’s missing is good human trial data for skin specifically. Treat it as a soothing traditional remedy rather than a treatment, and read the German chamomile profile for how it’s usually prepared. The allergy caution below applies squarely here.

Oregon grape and indigo naturalis — worth knowing for psoriasis

These two get less attention than they deserve. A 2018 review of eight studies found topical Mahonia aquifolium (Oregon grape) produced statistically significant improvement in psoriasis and atopic dermatitis symptoms with minimal side effects. And a 2017 randomized, double-blind, placebo-controlled study of 24 people with moderate plaque psoriasis found indigo naturalis significantly improved Psoriasis Area and Severity Index scores compared with placebo [NCCIH clinical digest, 2021].

Twenty-four people is a small trial. These are worth raising with a dermatologist as possible add-ons, not swaps for treatment that works.

Where the herbal approach consistently falls short

This part matters more than the wins, because it’s where people waste money and time.

• Oral supplements for eczema. A 2013 Cochrane review of 27 randomized trials with 1,596 participants found evening primrose oil and borage oil taken by mouth had no clinical benefit for atopic eczema. A 2012 Cochrane review of 11 trials of dietary supplements found no convincing evidence either. The American Academy of Dermatology’s guidelines state there is inconsistent to no evidence for fish oils, evening primrose oil, borage oil, multivitamins, zinc, vitamin D, vitamin E, B12 and B6 [NCCIH, 2021].
• Chinese herbal medicine for eczema. A 2013 Cochrane review of 28 trials with 2,306 participants found no conclusive evidence it reduces severity in children or adults. There’s a safety issue on top: some topical Chinese herbal preparations have been found to contain high concentrations of dexamethasone, a potent steroid, undeclared [NCCIH, 2021].
• Impetigo. There’s insufficient evidence to either recommend or dismiss herbal treatments, including tea tree oil, garlic, coconut oil and manuka honey. Impetigo is a bacterial infection that spreads, and it moves fast through classrooms and day cares. It needs proper treatment and hand hygiene, not experimentation.
• Rosacea. Several botanicals have shown promise, but most of the studies were not methodologically rigorous. Topical azelaic acid — which occurs naturally in whole grains — has better support from randomized trials [NCCIH, 2021].

If eczema is your main concern, the roundup of herbs traditionally used for eczema is a useful list of what people reach for — read it alongside the evidence above, and expect soothing rather than resolution.

Plants on traditional skin lists you should not use

Some plants earned a place in old herbal compendiums and have no business in a modern skincare routine. These are not theoretical risks.

Do not use these on or in your body Oleander and foxglove. Both contain cardiac glycosides. Every part of the oleander plant is toxic, with roots and seeds highest in toxin, and swallowing between five and fifteen oleander leaves has caused fatal poisoning. Poisoning looks like a digoxin overdose: nausea, vomiting, and dangerous heart rhythm disturbances [California Poison Control System].Pokeweed. Common across the eastern and southern United States, and still cooked as “poke sallet” in parts of the South. All parts are toxic, with the highest concentrations in the roots, leaves and stems. The roots should never be eaten. Symptoms usually start within six hours, and more than ten uncooked berries can cause serious problems in a child. Even the traditional double-boiling method carries no guarantee of safety [MedlinePlus, 2023].Greater celandine, taken by mouth. More than a dozen published reports describe acute liver injury, typically appearing one to six months in, with jaundice and markedly raised liver enzymes. A 1999 case series described ten women aged 37 to 67 who developed hepatitis while taking celandine for digestive problems or eczema over one to nine months; all recovered within two to six months of stopping, and one relapsed on restarting it [LiverTox, NIDDK].Comfrey, taken by mouth. Comfrey contains pyrrolizidine alkaloids that the liver converts into toxic pyrrole metabolites capable of damaging liver blood vessels and causing sinusoidal obstruction. It is now widely accepted as toxic taken internally, and oral formulations are restricted or banned in most countries. Infants appear particularly susceptible [LiverTox, NIDDK]. If you or someone else has swallowed any part of these plants, call Poison Help at 1-800-222-1222 from anywhere in the United States. Don’t wait for symptoms to show up. Topical comfrey products do exist. As a precaution, don’t take them internally and don’t apply them to open wounds without medical advice.

Using herbs on your skin without making things worse

• Patch test first. Apply a small amount to the inner forearm and leave it 48 hours before using it anywhere visible.
• Dilute essential oils. Tea tree and similar oils go on diluted in a carrier oil, never neat, and never in the mouth.
• Keep them off broken skin. Open wounds, weeping eczema and active infections absorb more and sensitize more readily. That’s the moment to see someone, not to experiment.
• Buy fresh and use it up. Oxidized essential oils are more allergenic than fresh ones.
• Don’t assume quality control. Dietary supplements aren’t approved by the FDA before they go on sale; manufacturers are responsible for evaluating their own products’ safety and labeling [NCCIH, 2025].
• Give it a bounded trial. Two to four weeks is enough to tell whether something is helping. If it isn’t, stop — and if it stings, burns or spreads, stop immediately.

Side effects, interactions, and who should be careful

Ragweed and daisy-family allergy

Chamomile, calendula, echinacea and yarrow all belong to the Asteraceae family. People are more likely to have an allergic reaction to chamomile if they’re allergic to related plants such as ragweed, chrysanthemums, marigolds or daisies [NCCIH chamomile fact sheet]. If ragweed season wrecks you every fall — and for a lot of the country it does — patch-test carefully or skip this group.

Drug interactions worth knowing about

• Chamomile. May have some estrogen-like effects. Preliminary studies suggest taking it with birth control pills might reduce their effect, and it might worsen estrogen-sensitive conditions such as breast or uterine cancer. Interactions with warfarin and with drugs metabolized by the liver have been reported [NCCIH].
• St. John’s wort. It interacts with a very large number of medicines and can weaken the effect of important ones, including some antidepressants. Taken alongside drugs that affect serotonin, it may cause serious serotonin-related side effects [NCCIH].
• Aloe by mouth. Overuse of aloe latex may increase the risk of adverse effects from cardiac glycosides such as digoxin [NCCIH].

Pregnancy and breastfeeding

Aloe taken by mouth — as gel, latex or whole leaf extract — may be unsafe during pregnancy and breastfeeding [NCCIH]. St. John’s wort may be unsafe in pregnancy because it may increase the risk of birth defects, and breastfed infants whose mothers take it can experience colic, drowsiness and lethargy [NCCIH]. For anything else, the honest answer is that most herbs simply haven’t been studied in pregnancy. Ask your OB-GYN, doctor or pharmacist before starting.

Who should avoid self-treating with herbs

• Babies and young children, whose skin absorbs more and who tolerate less.
• Anyone immunosuppressed, on chemotherapy, or with diabetes and a foot wound.
• People with widespread or broken eczema, where the damaged barrier raises the risk of both absorption and new sensitization.
• Anyone taking several prescription medicines. Your pharmacist can screen for interactions in about a minute, and you don’t need an appointment.

When to stop self-treating and get help

The most important thing on this page is knowing when a skin problem stops being a skin problem. One point of vocabulary first, because it trips people up constantly: cellulitis is a bacterial infection of the deeper layers of skin and the tissue underneath. It is not cellulite. Cellulitis needs antibiotics, and a poultice will only buy the infection time to spread.

Call your doctor’s office today, or go to urgent care, if you have signs of cellulitis: Skin that’s painful or tender, warm to the touch, and swollenRedness or discoloration that keeps expanding, or a sore or rash that came on suddenly and grew quickly in the first daySkin that looks tight, glossy or stretchedFever with chills and sweating, fatigue, or nausea and vomiting alongside any of the above Clinicians often draw a pen line around the edge of the redness to track it. You can do the same at home — if the redness has crossed the line by morning, the infection is winning. Already on antibiotics? Get back in touch right away if you develop: A fever that won’t quitDrowsiness or unusual lethargyBlistering over the infected areaRed streaks spreading out from the area Head to the ER rather than waiting if: You’re very sick — a very high fever, low blood pressure, or nausea and vomiting that won’t stopThe infection is spreading despite antibioticsThe infection is around your eyeYour immune system is compromised by cancer, HIV or another condition Untreated cellulitis can lead to sepsis, bone infection, endocarditis, meningitis, shock or tissue death (MedlinePlus, reviewed April 2025).

Book an appointment, don’t reach for an herb, if:

You notice a change in your skin — a new growth, a sore that doesn’t heal, or a change in an existing mole. For moles, the reminder is A-B-C-D-E: asymmetry, an irregular or jagged border, uneven color, a diameter larger than a pea, and evolution over recent weeks or months [CDC on skin cancer symptoms].

• Eczema or psoriasis isn’t controlled by regular moisturizing.
• A rash appears after starting a new medicine.
• Anything is spreading quickly, or a wound isn’t healing.

The unglamorous things that help most skin the most

Before any herb, the basics do more work than they get credit for. Atopic dermatitis can’t be cured, but the right treatment plan controls it — and that plan starts with moisturizer, not botany. Keeping skin well moisturized helps prevent the cracks and fissures that lead to a worsening rash, more itching, or infection [American Academy of Dermatology]. The National Eczema Association makes the same point about consistency: a regular moisturizing routine is central to managing symptoms [National Eczema Association, 2026].

Trigger management does the other half of the work. Common culprits include skin care products, hot or cold weather, wool clothing, stress, fragrance, perfume and harsh detergents — different people react to different things, and some never pin down a specific trigger [AAD]. Dermatologists suggest loose-fitting 100% cotton clothing, never wool against the skin, and fragrance-free, dye-free laundry detergent [AAD skin care guidance].

For the itch itself, scratching makes the rash worse and can seed an infection. Cool compresses, an anti-itch medication or an oatmeal bath are better moves [AAD].

There’s a bonus in all this. Moisturized skin cracks less, and cracks are exactly how bacteria get into the deeper layers in the first place — which is why keeping skin moist with lotion or ointment sits on the standard prevention list for skin infection [MedlinePlus]. Add daily sun protection and you’ve covered more ground than most herbal routines will.

HEALTH DISCLAIMER: This article is for general information and education. It is not medical advice, and it is not a substitute for diagnosis or treatment from a qualified healthcare professional. Skin conditions can look alike and be treated very differently, so a rash you assume is eczema may be something else entirely. Talk to your doctor, dermatologist or pharmacist before using any herbal product — particularly if you are pregnant or breastfeeding, treating a child, taking prescription medicines, living with a long-term condition, or have a weakened immune system. If a skin problem is spreading, painful, infected, or not improving, seek medical care rather than continuing to self-treat. In a poisoning emergency, call Poison Help at 1-800-222-1222. For a medical emergency, call 911.

Frequently Asked Questions

References

1. National Center for Complementary and Integrative Health. “Aloe Vera: Usefulness and Safety.” NIH, last updated February 2025. View source
2. National Center for Complementary and Integrative Health. “Skin Conditions and Complementary Health Approaches: What the Science Says.” NCCIH Clinical Digest, NIH, August 2021. View source
3. National Center for Complementary and Integrative Health. “Chamomile: Usefulness and Safety.” NIH. View source
4. National Center for Complementary and Integrative Health. “St. John’s Wort: Usefulness and Safety.” NIH. View source
5. MedlinePlus Medical Encyclopedia. “Cellulitis.” U.S. National Library of Medicine, review date April 1, 2025. View source
6. American Academy of Dermatology. “Eczema types: Atopic dermatitis diagnosis and treatment.” aad.org. View source
7. American Academy of Dermatology. “Eczema types: Atopic dermatitis skin care.” aad.org. View source
8. American Academy of Dermatology. “Eczema types: Contact dermatitis tips for managing.” aad.org. View source
9. National Eczema Association. “Moisturizing for Eczema.” nationaleczema.org, updated March 2026. View source
10. National Institute of Diabetes and Digestive and Kidney Diseases. “Comfrey.” LiverTox. NCBI Bookshelf, NBK548370. View source
11. National Institute of Diabetes and Digestive and Kidney Diseases. “Greater Celandine.” LiverTox. NCBI Bookshelf, NBK548684. View source
12. MedlinePlus Medical Encyclopedia. “Pokeweed poisoning.” U.S. National Library of Medicine, review date November 2, 2023. View source
13. California Poison Control System. “Naturally Occurring Cardiac Glycoside Poisoning.” University of California, San Francisco. View source
14. Givol O, Kornhaber R, Visentin D, Cleary M, Haik J, Harats M. “A systematic review of Calendula officinalis extract for wound healing.” Wound Repair and Regeneration, 2019;27(5):548–561. DOI 10.1111/wrr.12737. PMID 31145533. View source
15. Centers for Disease Control and Prevention. “Symptoms of Skin Cancer.” CDC. View source