The phenomenon of ulceration at the base of the thigh on both sides of the testicles is most common in fungal infectious diseases such as tinea cruris, but also in eczema and other diseases. 1. ringworm: belonging to fungal infectious diseases, patients are often accompanied by localized symptoms of significant itching, due to intense itching and easy to scratch the skin, secondary infection and oozing, causing testicles on both sides of the phenomenon of ulceration. 2. Eczema: It is an inflammation of the superficial dermis and epidermis caused by a variety of internal and external factors. In the acute stage, the skin surface appears papules, blisters, and then vesicles, edema, oozing and so on. The testicles on both sides of the thigh root appeared ulcers, patients are advised to go to the hospital in time for the appearance of uncomfortable symptoms.