What is this small circle rash on your upper thigh that red rough but not scaley and either inflamed or turns brown gone away for months?

Tinea cruris, or jock itch, is a common fungal infection that affects the skin of the groin and upper thighs. It is caused by a type of fungus called dermatophyte, which thrives in warm, moist environments. Jock itch is characterized by a red, itchy rash that may also be scaly or cracked. In severe cases, the rash may spread to the buttocks and abdomen.

Jock itch is typically treated with antifungal creams, powders, or sprays. These medications are available over-the-counter or by prescription. In some cases, oral antifungal medications may be necessary.

To prevent jock itch, it is important to keep the groin area clean and dry. Avoid wearing tight-fitting clothing that can trap moisture. Change out of sweaty clothes as soon as possible after exercise.

If you develop a rash in the groin area, see your doctor or a dermatologist to get a diagnosis and treatment.