Sweating at the base of the thighs may be caused by physiological factors, or may be caused by acute eczema, ringworm, vegetative nerve disorders and other disease factors. 1. Physiological factors: hot weather, strenuous exercise, wearing too thick, emotional excitement and other factors can lead to thigh root sweating, usually accompanied by head, back and other parts of the body sweating, which is a normal physiological phenomenon. 2. Acute eczema: acute eczema has a tendency to ooze, manifesting itself in the form of corn-grain-sized papules, small blisters, itching and other symptoms, especially after scratching, there is obvious plasma exudation, which leads to moist thigh roots. 3. Ringworm: due to the infectious disease caused by dermatophytes, ringworm will have inflammatory exudation in the acute stage, aggravating the dampness of the thigh root, and at the same time, there will be erythema covered with scales, and often itching. 4. vegetative nerve disorder: vegetative nerve disorder leads to exuberant secretion of sweat glands, the symptoms of thigh root sweating. Thigh root sweating may also be caused by other factors, after excluding normal physiological factors, it is recommended that the patient consult a doctor in a timely manner, in order to clarify the cause of the disease, for targeted treatment.