Sweating of the feet is not necessarily due to kidney yin deficiency, but may also be related to dampness and heat in the spleen and stomach (the spleen and stomach feel dampness and heat). If kidney yin deficiency causes kidney yin fluid insufficiency and symptoms such as heart heat (heat in the heart of the hands and feet, and self-consciousness of the heart and chest), hot flashes (a burst of heat); if damp-heat evil stagnation of the spleen and stomach, not only manifested as acid reflux, nausea, bitter taste in the mouth and other symptoms, but also may be accompanied by sweaty hands and feet symptoms. 1. Kidney yin deficiency: Kidney yin deficiency refers to the deficiency of kidney yin, and the deficiency of kidney yin leads to the deficiency of kidney yin fluid and the emergence of five heartburn heat, hot flashes, night sweating (abnormal sweating after going to sleep, and the sweating stops after waking up), lumbar and knee pain, dizziness, tinnitus, insomnia and dreaming, etc., in which the five heartburn heat will be manifested by sweating of the hands and feet, etc.. 2. Damp heat of the spleen and stomach: Damp heat of the spleen and stomach is mainly caused by the stagnation of the spleen and stomach with damp heat, often showing heartburn, acid reflux, nausea, bitterness in the mouth, etc., accompanied by sweating of the hands and feet. If you have sweaty feet for a long time, you should go to the hospital as soon as possible to get a clear picture of the cause of the disease and avoid aggravation with the development of the disease.