In medical science, sweating in the waking state is called spontaneous sweating; sweating during sleep is called night sweating. Night sweating is a Chinese medical term for a condition characterized by abnormal sweating after falling asleep, and sweating that stops upon awakening. Theft means stealing, ancient doctors use thieves every day in the night sneaky activity to describe the disease evidence with whenever people sleep, or just a closed eyes and will sleep, sweat like thieves secretly leaked out. Some patients have night sweats as soon as they fall asleep, some have night sweats after they fall asleep until midnight, and some have night sweats just after they close their eyes. The amount of sweat that comes out varies greatly. According to the clinical performance of night sweat patients, can be divided into light, medium and heavy three. 1, light night sweat light night sweat patients, most of the sleep has been deep, or at 5:00 in the morning or 1 to 2 hours before waking up sweat easy to sweat, sweating less, only after waking up feeling slightly wet sweat all over the body or some parts of the body, no sweat again after waking up. Generally not accompanied by uncomfortable feelings. 2, medium-sized night sweats Medium-sized night sweats patients, most of the sweat can be leaked soon after going to sleep, or even make the sleepwear wet, sweat will stop after waking up, wipe the sweat from the body, and then go to sleep that no longer sweat. In this type of night sweats, patients often have a sense of baking heat, hot as sweat, and sometimes have a dry mouth and throat after waking up. 3, heavy night sweat Heavy night sweat patients, sweat is very easy to escape. Soon after going to sleep or just close your eyes when you are about to go to sleep, that is, there is a large amount of sweat night gush, sweat can be awakened, after waking up sweat can suddenly converge. When you go back to sleep, you can sweat again. Sweating, sweat often with a light salty smell, or sweating at the same time mixed with sweat odor. The sweating can make the bedding wet, and it is impossible to sleep peacefully if the sleeping clothes are not replaced several times a night, and some patients with heavy evidence can make the bedding wet, and when the bedding is thin or with a mat, the sweat can print sweat stains on the bed board. Usually, it can be accompanied by low fever or hot flashes, five heartburn, red cheekbones, dizziness, emaciation, fatigue, dark urine, low urine volume, and dry stools. Light and medium night sweats do not cause too much damage to the body, but heavy night sweats often worsen over time and develop into “desiccation”, seriously threatening the patient’s health and life safety.