Red bumps on the inner thighs are generally considered to be symptoms of ringworm, contact dermatitis, insect bite dermatitis, or folliculitis. 1. Ringworm is a skin disease caused by fungal infection, which is mainly transmitted through skin-to-skin contact, and some people have been infected by the fungus on their own hands and feet on their inner thighs. The manifestation of the inner thighs appear clearly bordered large red spot, red spot edge has a ring-like arrangement of raised small bumps, itching obvious. 2. Contact dermatitis is caused by allergies, is the inner thigh skin contact with some stimuli caused by allergic reactions, many people are allergic to underwear dyes or belts and other items. Many people are allergic to items like underwear dyes or belts. Symmetrical scattered erythema and pimples appear on the inner thighs, accompanied by varying degrees of itching. 3. Insect bite dermatitis occurs after being bitten by mosquitoes and manifests itself as scattered red bumps on the legs, some of which have red spots or blisters on the surface, and itching is intense. 4. Folliculitis is caused by bacterial infection of the skin, usually a small break in the skin is caused by bacterial infection, do not pay attention to clean people are prone to get sick. The manifestation of the skin appeared on a bean grain to coin size red bumps, bumps on the surface of the pus points, there is obvious pain, pain aggravated by pressure. Red bumps on the inner thighs are recommended to go to the dermatology department for a clear diagnosis and symptomatic treatment.