![]() ![]() No one is exactly sure what causes pityriasis rosea, but some speculate it may be related to human herpesvirus type 7 (HHV-7). In a few weeks, smaller, scaly patches develop. The AOCD also reports that in about 75 percent of cases, the rash - which is usually found on the neck, trunk, arms, and thighs - starts with what’s called a “herald” patch. Pityriasis roseaĪccording to the American Osteopathic College of Dermatology (AOCD), this is a common rash that tends to appear more often in the spring and fall, in the young versus the old, and in women as opposed to men. Irritation is due to dull razor blades, bacteria on razor blades, and an improper shaving technique such as pressing too hard on the blade. It’s different from razor bumps, which are caused by ingrown hairs. Razor burn is skin irritation, usually characterized by small red bumps. In fact, it’s estimated that 20 percent of the population get heat rash in the summer, usually infants and young children. Heat rashĪlso known as prickly heat, this rash looks like clusters of small red pimples that may itch or feel “prickly.” It generally occurs where skin touches skin and occurs when sweat glands become blocked.Īs the name implies, heat rash most often occurs in hot, humid weather and environments. Skin becomes inflamed, red, and itchy or burning. While any part of the body can be affected, the inner thighs are a common one due to the rubbing together of thighs - and, thus, exposure to clothing or detergent irritants. The former is called irritant dermatitis and it accounts for 80 percent of all contact dermatitis. Contact dermatitisĬontact dermatitis occurs when the skin comes into contact with something it’s allergic to - think poison ivy or nickel in jewelry - or irritated by, for example a material in clothing or a fragrance in detergent. While it’s not common in women, they’re not immune to it. The rash is contagious, spread via skin-to-skin contact and the sharing of towels or other personal items. The rash often takes on a reddish half-moon shape on the inner thigh area with small, weeping, blisters and patches of scaly skin on the border. It’s also caused by the same fungus that causes athlete’s foot. Jock itch is actually a misnomer, because athletes aren’t the only ones who get it. It’s common in men - mostly because they sweat more than women, creating a moist environment, and because their genitalia generates a lot of heat. This rash also goes by the name of tinea cruris and ringworm of the groin. Here are some inner thigh rashes and their causes: Jock itch ![]()
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