The causes of foot sweating in the elderly can be broadly categorized into two, one physiological and one pathological. 1. Physiological factors (1) Physical factors: the elderly body is relatively weak, a little exercise will be sweating, or its own is easy to sweat body, sweat glands are more developed, a little movement is easy to sweat. (2) Environmental factors: living in a hot climate, high temperature environment, coupled with poor ventilation, high indoor temperature will not only have feet sweat, the whole body can also sweat. (3) Excessive exercise: if the elderly usually love sports, like walking, jogging, etc., or wear breathable shoes and socks, etc., there may also be foot sweating. 2. Pathological factors (1) Yin deficiency and internal heat: the elderly liver and kidney yin deficiency, deficiency of yin fluid in the body, yin does not converge yang, resulting in deficiency fire, deficiency fire forced fluid out of the sweat. (2) Dampness and heat accumulation (dampness and heat in the body of the evil each other agglomeration): due to improper diet, like to eat spicy greasy stimulating products, or emotional upset, or mis-treatment, etc., resulting in the body of dampness and heat within the fumigation of the yin, yin fluid by the heat disturbed by the steaming and sweating, sweating more yellow, thick and sticky, or will also be accompanied by skin ulcers, eczema and other symptoms. Older people sweating feet may have other reasons, it is recommended that timely hospital consultation, under the guidance of a professional physician for treatment, so as not to delay the condition.