St John's wort (red oil for burns and wounds)

What is St John's wort (red oil for burns and wounds)?

St John's wort red oil is a skin remedy made from the flowers of Hypericum perforatum. The fresh yellow flowers are steeped in a plant oil, often olive or sunflower. Over a few weeks the oil turns deep red.

In Nordic homes it was dabbed on small burns, sunburn, grazes, bruises and dry skin. The plant is called mäkikuisma in Finland, johannesört in Sweden and prikkperikum in Norway.

Here is the honest verdict. Human evidence for the oil on skin is thin and comes from a few small, weak trials. Long use in folk medicine is not proof that it works, and it is not proof that it is safe.

One point is firm: the oil can make treated skin burn more easily in sunlight.

How does St John's wort (red oil for burns and wounds) work?

No one has shown clearly how the red oil helps skin. Most of what we know comes from test tubes and animals.

In lab tests, hyperforin from the plant slows Staphylococcus aureus, a germ often found in wounds. Whether it does the same on a real wound is not known.

In cell studies, the flavonoids appear to damp down inflammation (swelling and redness). In animal wound models, hypericum extracts seem to speed skin closing and raise collagen, the protein that rebuilds skin.

One effect is well established in people. Hypericin makes skin more sensitive to sunlight, so treated skin can burn faster.

The oil base itself also matters. Any plain oil softens skin and holds water in, which eases dryness and tightness.

What forms does St John's wort (red oil for burns and wounds) come in?

Red oil is the usual skin form. You may see it sold as Hypericum oil or oleum hyperici. It is a plain infused oil, deep red to red-brown.

It also turns up in salves, creams and ointments. Some are blended with calendula, arnica or beeswax.

Strength varies a lot between products. Home-made oil is not measured at all.

Taken by mouth, St John's wort is sold as tablets, capsules and tea for low mood. Those products are a different matter and clash with many drugs. This page covers the oil used on skin.

Where it comes from:

The plant has a long record in Nordic and wider European folk medicine. Flowers were picked around Midsummer, near St John's Day in late June, which gave the plant its English name.

Country healers steeped the flowers in oil and used the red result on burns, cuts, bruises and sore backs. The red colour was read as a sign that the plant belonged with blood and wounds.

It was also hung over doors and barns to keep harm away. European writings on the oil go back to the Middle Ages.

The habit carried on into modern Scandinavian home care. This is history, not advice to treat yourself.

What does St John's wort (red oil for burns and wounds) help with?

• Minor burns and sunburn: This is the classic Nordic use: a dab of red oil on a small kitchen burn. Human trials on burns are almost absent. Cool running water for 20 minutes is the step with real proof, and it comes first. Oil should never go on a fresh, deep or blistered burn.
• Small cuts, grazes and scrapes: Tradition used it to keep a scrape soft so the scab did not crack. Lab work shows some germ-slowing action, but this has not been shown on human skin. Clean the wound with water first. A clean dressing still matters more than the oil.
• Healing scars after surgery or childbirth: This is where the best human evidence sits, and it is still weak. Small trials in women after caesarean birth found better scar look and less pain with a hypericum ointment. The trials were short and small. Treat the result as a hint, not a settled fact.
• Dry, cracked or irritated skin: A small German trial of a St John's wort cream found less itch and redness in mild eczema than the plain base cream. It had only about 20 people and used a measured extract, not home oil. Any plain oil softens dry skin. Some of the benefit may simply be the oil.
• Bruises and sore muscles: Folk use rubbed the oil into bruises, stiff backs and sore shoulders. There are no good human trials for this. Rubbing on its own feels soothing. That may be most of what people notice.
• Nerve-type pain, in tradition only: Older texts used the oil on shingles pain, sciatica and nerve twinges. Human evidence here is missing. Nerve pain needs a proper diagnosis. See a doctor rather than treating it blind.

What are the side effects of St John's wort (red oil for burns and wounds)?

• Sunburn-like redness or blistering on treated skin after sun
• Itching or rash where it is applied
• Allergic contact dermatitis (an itchy allergic skin rash)
• Stinging on raw or broken skin
• Red-brown staining of clothes and bedding
• Rare blistering in very fair-skinned people

Good to know:

Most people who use it on a small patch of healthy skin have no trouble. The main real risk is a sun reaction, and fair skin is most at risk.

Stop at the first sign of rash, swelling or burning. Wash the oil off with soap and water.

How much St John's wort (red oil for burns and wounds) should you take?

• Recommended daily: Labels on skin oils usually say to put a thin layer on clean skin, two or three times a day. That is what the product carries, not advice for you. No amount has been properly tested for this oil.
• Best time of day: Evening is the common choice. Treated skin burns more easily in sun, so night use with the area covered by day lowers that risk. Timing does not change how well it works.
• With or without food: Food does not apply here, as this is an oil for skin. Food timing matters only for St John's wort taken by mouth, which is a different product. Do not swallow the red oil.
• Time to effect: Softening can feel instant, mostly because oil holds water in the skin. Any real change in a graze or scar would take days to weeks. It may also do nothing at all.
• How long to take it: Labels often suggest short runs of a few days up to two weeks for a minor problem. Scar products are sometimes used longer, with a doctor's input. If skin is no better after two weeks, stop and get it checked.