Ringworm is a common fungal skin infection that spreads outward in a scaly ring with a raised edge. There is no worm involved. It clears with antifungal treatment, as long as the treatment is used for long enough and steroid creams are kept away from it. Tinea versicolor is a common, harmless rash caused by a yeast that already lives on everyone's skin. It leaves flat, finely scaly patches on the chest, back and shoulders that are lighter, darker or pinker than the skin around them. Treatment clears it quickly, the color takes months to even out, and it often returns in warm weather.
The same eight facts on every condition comparison.
It is a fungal skin infection.
Tinea corporis is dermatophyte infection of body skin.
The ring is a clue only.
It may be absent, especially after steroid creams.
It is an umbrella term.
Related infections affect the scalp, nails and other sites.
Testing guides treatment.
Scrapings or culture confirm infection; scalp and nail infections need different care.
It is a surface yeast condition.
Also called pityriasis versicolor, it affects only the outer skin layer.
It changes skin color.
Small patches can merge across the upper chest, back, neck or upper arms.
Fine scale is a clue.
Surface scale helps distinguish active disease from other pigment changes.
Color returns more slowly.
Pigment can take longer to even out after the yeast has been treated.
Tinea corporis (body ringworm) Rings on the body and limbs.
Tinea capitis (scalp ringworm) Generated illustration. Scaly patches with hair loss.
Tinea cruris (jock itch) Jock itch in the inner thighs.
Tinea pedis (athlete’s foot) Athlete's foot.
Hypopigmented tinea versicolor Lighter patches; most common.
Hyperpigmented tinea versicolor Darker or pinkish patches.
Dermatophyte fungi grow in the keratin of the outer skin and spread outward. Inflammation and scale often concentrate at an expanding border, while the center may look clearer.
Malassezia yeast overgrows in the outer skin and disturbs the usual pigment balance. Affected areas develop fine scale and may look lighter or darker than surrounding skin.
Ringworm. Can occur at any age after exposure to an infected person, animal or contaminated material.
Tinea Versicolor. Most common in adolescents and young adults, especially in warm humid climates.
Ringworm is a fungal infection of the skin's outer layer. It isn't caused by a worm; the name comes from the ring-shaped rash.
Tinea versicolor is an overgrowth of Malassezia, a yeast that normally lives on the skin. The yeast interferes with pigment, leaving lighter or darker patches.
It tends to run in families.
Evidence labels come from each condition’s own treatment list.
The most effective cream you can buy for ringworm on the body, and it kills the fungus rather than just stopping it growing, so the course is shorter — often one to two weeks. Take it a couple of centimetres past the visible edge. It does not work on the scalp or the nails, where the fungus sits out of reach.
The familiar azole creams, sold everywhere and cheap. They work well on body ringworm, but they stop the fungus growing rather than killing it, so they are used twice a day for two to four weeks and for one to two weeks after the skin looks clear. Stopping at the point it looks better is the usual reason it returns.
An older antifungal, most often sold as a powder or spray. It works on body and foot ringworm but more slowly than terbinafine, and it is weaker on stubborn patches. Its real use is keeping the feet and shoes dry after treatment, since untreated feet are what reseed the rest of the skin.
It does have some antifungal activity, and it is the home remedy people ask about most. The trouble is that it clears ringworm far less reliably than a pharmacy cream, it commonly irritates the skin, and weeks spent on it are weeks the patch keeps spreading. There is no reason to choose it over a proven cream that costs about the same.
The usual first choice, used as a body wash rather than on the hair. Lather it over the chest, back and shoulders, leave it on for about five minutes so it has contact time, then rinse, daily for one to two weeks. Contact time matters more than strength here — the 1% is on the shelf and the 2% is on prescription, and people who rinse straight off usually conclude it did not work.
The cream works well on a small number of patches, applied twice a day for a couple of weeks, but covering a whole back with it is impractical and expensive. The tablets are the odd exception in this condition. They clear athlete's foot and ringworm and do nothing at all here, because this is a yeast rather than the fungi those tablets are built for.
Sold for evening out patchy skin, and the wrong tool here, because the problem is a patch that is too light rather than skin that is too dark. They do not speed the pigment up. Creams bought without a prescription are also a common source of undisclosed strong steroids, which thin the skin over time. The patches recover on their own once the yeast is controlled.
Just as effective as ketoconazole for this and usually cheaper, spread over the affected area, left on for five to ten minutes and washed off. It has a noticeable sulfur smell that lingers, and it can discolor fabric and light hair, so old clothes and a thorough rinse are worth planning for.
A gentler wash, better suited to keeping this away than to clearing a flare. It is the one most people find easy enough to keep using twice a month right through the summer, which is the part that actually prevents the next episode. On a widespread flare it is slower than ketoconazole or selenium sulfide.
Ketoconazole 2% cream. The prescription strength of a familiar antifungal, used for body ringworm that has not cleared on an over-the-counter cream, and for larger patches. It is applied once or twice a day for two to four weeks. Like every cream, it is the wrong tool for the scalp and nails.
Ciclopirox cream. A broad antifungal that also settles inflammation a little, which suits an angry, very itchy patch. It is a reasonable choice when azole creams have not worked or have irritated the skin. It still needs the full course and the same treating past the edge.
Econazole cream. A prescription azole cream used much like clotrimazole, applied once daily for two to four weeks. It has some activity against bacteria as well, which is occasionally useful in a moist fold or between the toes where both are present.
Ciclopirox, econazole or ketoconazole 2% cream, applied to the patches for two to four weeks. They are a reasonable choice when only a small area is involved, or when a medicated wash has irritated the skin. Across a whole back they are expensive and hard to apply properly, which is the point at which tablets are the sensible option.
Terbinafine tablets. The usual tablet for ringworm that cream cannot reach — scalp infections, nails, widespread patches and stubborn cases. Typically two to four weeks for the scalp and several months for nails, because the nail has to grow out. Liver blood tests are checked for longer courses, and it interacts with a number of other medicines.
An equally effective alternative, often used for nails, for widespread infection and for cases that have not responded to terbinafine. It is sometimes given in pulses of one week a month. It interacts with a long list of common medicines, including statins and some heart drugs, so bring your full list to the appointment.
The oldest scalp treatment and still a first choice in children for some species of fungus. It needs six to twelve weeks, and it is absorbed much better when taken with a fatty meal. Newer tablets work faster, so which one is used depends on the species the lab identifies.
A once-weekly tablet, used mainly when terbinafine and itraconazole do not suit. It clears dermatophyte infections less reliably than either, so it is a second-line option here rather than a first choice, even though it is the antifungal most people have heard of.
The usual tablet when the area is too large to treat by hand or topical treatment has genuinely failed, given as a short course of a few days. It clears the yeast quickly and does nothing to speed up the color, which still takes months. It interacts with a long list of other medicines, so the prescriber needs your full list.
The other short-course tablet, sometimes given as a single dose repeated a week later. It works about as well as itraconazole for a widespread rash. Neither tablet stops it coming back, so the monthly wash is still the plan afterwards. If you are pregnant or breastfeeding, ask the doctor managing your pregnancy before taking either.
Untreated, ringworm expands slowly rather than resolving. Treated, it is predictable. Scalp and nail infections run much longer and need tablets — weeks for the scalp, months for nails, which have to grow out.
Tinea versicolor is harmless, and treatment runs in two stages. The infection stops within a week or two; the color takes months longer. Patchy skin is not the same as infected skin.
Kerion and permanent hair loss
Scalp ringworm can turn into a kerion — a boggy, tender, pus-oozing swelling where the immune reaction has gone deep around the hair follicles. It happens mostly in children, and it can destroy follicles and leave a permanently bald scar. Oral antifungal tablets started early are what prevent it, which is why scalp involvement is never treated with cream.
Ringworm hidden by steroid cream
Steroid cream calms the itch and flattens the edge while the fungus keeps spreading underneath. What comes back is larger, shapeless and much harder to recognize, and it is often treated as eczema for months. If a rash improved on a steroid and then grew, say so at the appointment — it changes both the diagnosis and the test.
Nail Fungus
Ringworm that reaches the nails thickens and discolors them and lifts the nail from its bed. It matters twice over: creams cannot reach fungus under a nail, so it needs months of tablets, and until it is treated it acts as a reservoir that reseeds the feet, groin and body again and again. This is one of the most common reasons ringworm keeps coming back.
It persists and slowly spreads
Patches merge and cover more of the trunk over months. In temperate climates it often eases in winter and returns each summer.
The active infection stops fast
Within one to two weeks of a proper course the scaling stops and the patches stop expanding. The condition is treated at that point, even though the skin does not look normal.
Recurrence is the norm rather than the exception
A large share of people get it again, particularly in hot climates and in people who sweat heavily. The yeast is permanent, so treatment reduces it rather than removing it, and maintenance — a medicated wash once or twice a month in warm months — keeps most people clear.
Seek care for widespread, recurrent or uncertain rash, or scalp involvement. Steroid cream alone can disguise and worsen a fungal infection.
Seek assessment if the diagnosis is uncertain or treatment fails. Color may take months to normalize after the yeast has been treated.
No. Ringworm is a fungal infection of the outer layer of skin, related to athlete's foot. The name describes the rash, named long before the cause was understood.
For most body infections, much less so after a day or two of treatment. Contact sports set their own rules — wrestling commonly requires around 72 hours of treatment and the area covered. Check with your club or school rather than guessing.
Possibly. Kittens and puppies are common sources, often with only a small patch of thin or crusty fur, or nothing. If a new pet arrived shortly before the rash, ask a vet to check it. Treating people and not the animal is a common reason it keeps returning.
Yes. Same medicines — terbinafine, clotrimazole, miconazole — and the same infection elsewhere. The exception is the scalp and nails, where creams do not work whatever the tube says.
Usually one of three reasons: treatment stopped as soon as the skin looked clear, an untreated reservoir such as athlete's foot or fungal toenails, or a steroid cream somewhere in the routine. Occasionally an infection really is resistant, which needs testing and a prescription.
Not for a small patch on the body, which almost always responds to cream. Tablets are needed for scalp and nail infections, and widespread, deep or stubborn cases. That needs a doctor, partly because some oral antifungals interact with other medicines.
No. The yeast already lives on essentially everyone's skin. You cannot give it to a partner, a child or a housemate. Whether someone develops the rash depends on their own skin oil, the climate and their own susceptibility.
Because the color and the infection run on different timelines. Treatment stops the yeast within a week or two; the pigment takes months. Scratch a patch lightly — if fine scale lifts it is still active, and if the skin is smooth and simply a different color, the treatment worked.
Most likely, particularly in a hot, humid climate or if you sweat heavily. That is normal behavior, not treatment failure, because the yeast is a permanent resident. A medicated wash once or twice a month through the warm months prevents most recurrences and is far less work than treating a full flare.
No, and it makes it more obvious. The patches cannot tan, so the surrounding skin darkens and the gap widens. Sunscreen while the pigment recovers works better, along with time.
No. Athlete's foot comes from dermatophytes, picked up from the environment. This comes from Malassezia, a yeast that lives on everyone. That is why terbinafine tablets clear athlete's foot but do nothing for this, even though terbinafine cream helps.
Not usually — topical treatment clears most cases. Ask about tablets when a large area of the trunk is involved and applying a wash properly is impractical, when it keeps coming back, or when topical treatment has genuinely failed. They clear it faster but do not speed up the color or prevent recurrence, so you still need a maintenance plan.
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