Yang deficiency and Yin deficiency in men are different in terms of causes, main symptoms and treatments. Yang deficiency is usually caused by congenital weakness or damage to yang qi after prolonged illness. It includes spleen yang deficiency, kidney yang deficiency, heart yang deficiency, etc. It can be manifested as cold limbs, fear of cold, loose stools, pale face and so on. Clinical diagnosis and selection of warm-yang drugs for symptomatic treatment. Yin deficiency is usually due to a lack of yin and fluid, which cannot restrain yang qi and leads to various symptoms. Yin deficiency includes lung yin deficiency, kidney yin deficiency, heart yin deficiency and stomach yin deficiency. Symptoms of yin deficiency may include five heart-heat (heat in the heart of the hands and feet, and self-consciousness of heart and chest heat), dry mouth and throat, insomnia, night sweating (abnormal sweating after going to sleep, but sweating stops after waking up). Nourishing Yin medicines are needed to regulate the condition. If you are not feeling well, it is recommended that you go to the hospital in time and do not delay your condition.