Normally, about 15 minutes each time once a day. The following are normal conditions: (1) Increased sleep. (2) increased sweating of the feet; (3) increased urination; (4) increased stool frequency; (5) Increased secretion of nasal mucosa, eyes, trachea, etc.; (6) There is thirst and the amount of drinking water increases. All of the above are excluding waste gases and moisture from the body