Sweating all over the body after falling asleep has physiological causes such as heat and over clothing, as well as night sweats (sweating abnormally after falling asleep and stopping after waking up). However, the specific reasons need to be combined with personal circumstances to decide. 1. Physiological reasons: sweating is normal when the weather is hot or the indoor environment is too high, coupled with excessively thick clothing. 2. Pathological causes: Night sweating is often caused by deficiency of yin and blood, and dampness obstructing the qi mechanism. Patients with night sweating are often accompanied by progressive emaciation, hemoptysis, cough, afternoon hot flashes (a burst of fever), zygomatic redness (cheeks and zygomatic bones reddish in color) and so on. Patients who sweat all over the body after falling asleep are advised to seek medical treatment promptly.