Jacho

What is Jacho?

Jacho is the dried root of the plant Lithospermum erythrorhizon. In English it is called gromwell root. The root is dark purple-red, and it stains skin and cloth.

Korean healers use Jacho most of all on the skin. It goes into salves and oils for burns, rashes, sores and cuts that heal slowly. Some old texts also give it by mouth for a fever with a rash.

Here is the short verdict. Human trials are few, so we cannot say that it works. Long use in a tradition is not proof that a remedy works.

It can also be risky. Roots in this plant family may hold chemicals that harm the liver, so care is needed.

How does Jacho work?

No one has shown how Jacho works in the body. Most of what we know comes from lab dishes and tests in animals.

The root is full of shikonin, a red dye. In lab work, shikonin slows the growth of some germs. It also damps down signs of swelling in cells.

A skin salve may help in a plain way too. The oil and wax make a soft cover. That cover keeps a sore moist, and moist sores can heal better.

All of this is a best guess, not proof.

What forms does Jacho come in?

Purple skin salve or ointment. Korean Jawoongo and Japanese Shiunko are the best known.

Oil made by soaking the root in a base oil. Dried root slices for a tea. Powder, and drops in alcohol.

The root is also sold as a purple dye for food and make-up.

Where it comes from:

Jacho has a long record in East Asia. Korean texts such as the Donguibogam of 1613 list it. Chinese medicine calls the same root Zi Cao, and Japanese Kampo calls it Shikon.

A famous purple salve, Shiunko, was made in Japan around 1800. Korean Jawoongo is much the same blend. Healers used it for burns, sores and rashes.

The root was used as a cloth dye as well.

What does Jacho help with?

• Minor burns and scalds: This is the best known use. Korean, Chinese and Japanese healers have put the purple salve on small burns for hundreds of years. The proof is weak. Lab and animal work shows faster skin repair, but we could not find a good human trial. Big or deep burns need a doctor, not a salve.
• Eczema and itchy rashes: Old texts use Jacho for hot, red, itchy skin. The salve is put on in a thin layer. No human trial tells us if it beats a plain moisturiser. Some people get a rash from the salve itself, so try a small patch first.
• Cuts and sores that heal slowly, and bedsores: Healers used the oil on sores that would not close. Lab work shows shikonin can help skin cells move and grow. That is lab work, not people. Do not put it on deep, dirty or badly infected wounds. Those need proper care.
• Piles (swollen veins around the back passage): Some Korean and Japanese salves for piles hold Jacho. The aim is to calm soreness. We found no human trial for this use. If you bleed from the back passage, see a doctor first to find out why.
• Boils and small skin infections: Shikonin slows some germs in a lab dish, which fits the old use for boils. A lab dish is not a person. A boil with spreading redness, fever or pus needs a doctor, and may need antibiotics.
• Fever with a rash, in old texts only: Classical Korean and Chinese texts give Jacho by mouth for a hot fever with a purple rash, such as measles. We do not suggest this at home. There is no trial proof, and long use by mouth may harm the liver. A fever with a rash needs a doctor the same day.

What are the side effects of Jacho?

• Purple-red stains on skin, nails, clothes and bedding
• Itchy red rash where the salve was put, from an allergy
• Loose stools or diarrhoea when taken by mouth
• Stomach ache and loss of hunger when taken by mouth
• Liver harm with long or heavy use by mouth: rare, but serious
• Possible harm to a pregnancy

Good to know:

Stains are common and harmless, but hard to wash out. A skin allergy is less common; test a small patch first.

The gut upset is well known in old texts, which say to avoid Jacho by mouth if your stools are already loose.

Liver harm is the worry that matters most. It is linked to plant chemicals found in this plant family, and it can build up quietly over weeks.

Options to discuss with a clinician

For every problem gromwell root is reached for, there are routes with better evidence behind them — and each one is a conversation to have with a doctor, pharmacist or qualified herbalist, not something to pick up off this page.

**Minor burns and scalds, and slow-healing cuts or sores.** Medical-grade Honey dressings and Aloe Vera Topical both have reasonable trial evidence for wound surfaces, and a nurse or GP can tell you whether a wound is suitable for either, or whether it needs cleaning and proper dressing instead. Pressure sores (bedsores) always need assessment — skin breaking down over a bony point is a sign something in daily care has to change.

**Scars left behind.** Silicone Gel Sheets, Onion extract and Vitamin E Topical are all discussed in dermatology (skin medicine) clinics; ask which, if any, suits your scar type.

**Boils and small skin infections.** These can turn into deeper infection quickly. A pharmacist can tell you when a boil is safe to watch and when it needs a doctor and antibiotics.

**Eczema and itchy rashes.** Ask a clinician about identifying triggers alongside standard treatment; some people also raise Curcumin or Vitamin C with their practitioner.

**Fever with a rash** is never a self-treatment situation — seek same-day medical advice.

Graded pages for the options named above:

• Silicone Gel Sheets — evidence grade B, traditional tier T0
• Aloe Vera Topical — evidence grade B, traditional tier T3
• Vitamin E Topical — evidence grade C, traditional tier T0
• Onion extract — evidence grade B, traditional tier T3
• Vitamin C — evidence grade A, traditional tier T0
• Curcumin — evidence grade A, traditional tier T0
• Honey — evidence grade A, traditional tier T3