The inner thigh root long small red spots to consider is ringworm, rubella, thrombocytopenic purpura and other diseases caused. 1. ringworm: ringworm is a fungal infection, mainly caused by contact with the patient’s skin lesions or contaminated personal items, but also may have tinea versicolor, tinea pedis, etc. spread to the groin area, which will be manifested as redness in the affected area, with ring lesions and accompanied by the symptoms of itching. 2. Friction rash: if the patient is fat, leg fat is more, when walking, the inner thigh root will rub caused by friction rash, mainly manifested as red or dark red spots, some will have secretion, and there will be itching, burning pain and other symptoms. 3. Thrombocytopenic purpura: this disease and the body’s immune system disorders have to do with, will lead to thrombocytopenia, mainly manifested in the skin and mucous membrane bleeding, manifested in the size of a pinpoint bleeding spot. The inner thigh root long small red spots, there may be other reasons, should be timely consultation, clear cause after standardized treatment.