Inguinal ringworm, also known as Tinea cruris, is a fungal infection that affects the groin area, inner thighs and sometimes buttocks. It is caused by a type of dermatophyte fungus that thrives in warm, humid and poorly ventilated environments. Although it's not a serious condition, it can be very uncomfortable because of the severe itching and redness it causes.

It usually starts as a ring-shaped red spot, with well-defined edges that can be extended. The area may be dry or scaly, and there are almost always persistent itching or even burning. As the infection spreads, it can cause skin irritation or cracks if not treated in time.

The groin is a prone area due to its natural moisture, constant chafing and lack of ventilation. It's more common in people who sweat a lot, wear tight clothing, or don't dry the area well after showering. Athletes and overweight people have a higher risk, although anyone can develop it.

Yes, inguinal ringworm is contagious. It can be transmitted by direct skin-to-skin contact or by sharing common towels, underwear, sportswear, or showers (such as in gyms). It can also be infected from other parts of the body where ringworm already exists, such as the feet (athlete's foot).

With proper treatment, most cases improve in 2 to 4 weeks. However, if not treated properly, the infection may come back or spread to other areas of the body. Medical follow-up is key to avoiding relapses or chronification.

No. Although it may look or feel like an allergic reaction (due to itching and redness), ringworm is a fungal infection, not an immune response. This means that you need antifungal treatment, not corticosteroid or anti-allergic creams. Using the wrong treatment can worsen the condition.

Yes, but with caution. Wear clean, breathable sportswear, and shower immediately after training. Dry the area thoroughly with a dedicated towel and apply your treatment according to medical indications. Avoid sharing equipment, clothing, or public showers if possible, so as not to infect others.