Sudden sweating can have both physiologic and pathologic causes. Physiologic excessive sweating is mainly seen in hot summer, high room temperature, too much clothing, and so on. Pathologically, sudden sweating is also known as spontaneous sweating and night sweating. Self-sweating is daytime profuse sweating, while night sweating is sudden sweating at night. It may be caused by the lack of solidity of the lung guard, insufficiency of blood in the heart (insufficient blood in the heart), yin deficiency and fire exuberance (deficiency of yin and essence in the body, resulting in hyperactivity of deficiency and fire), and evil heat and vaporization. Lung Wei is not solid: when the external evil invades, the lung Wei is the first to be affected by the evil, resulting in symptoms such as sweating and bad wind, easy to catch a cold, fatigue (mental exhaustion, physical weakness), and a less colorful face. Heart-blood insufficiency: due to prolonged illness or over-exertion, resulting in the body’s own weakness, heart-blood insufficiency, which in turn will appear self-sweating or night sweating, palpitations (heartbeat accelerated, often accompanied by panic attacks), dazed and anxious, insomnia and dreamy and other symptoms. Yin deficiency and fire: due to improper diet, emotional upset and other factors, resulting in excessive internal fire, burning the yin fluid, which in turn produces night sweating, five heart heat (heat in the heart of the hands and feet, and self-consciousness of the heart and chest), zygomatic redness (cheeks zygomatic bone reddish in color), thirst and other symptoms. Evil heat and steam: due to the attack of poisonous evils or over-eating spicy food, the body contains heat, forcing the fluid to overflow and the symptoms such as sweating, sticky yellow sweat, red face and irritability appear. In addition, if there is a sudden large amount of sweating, you need to consult a doctor in time to take the correct diagnosis and treatment.