1, pay attention to the temperature of the solution, too high a temperature will damage the colon and rectal mucosa. 2, pay attention to the total amount of liquid, not more than 200ml. 3, anal canal and enema to maintain cleanliness, disposable items should be replaced in a timely manner, non-disposable items should be regularly disinfected by boiling. 4, the front of the anal canal should be coated with a little lubricant, such as liquid paraffin, medical petroleum jelly or Ma Ying Long hemorrhoid cream, etc., the speed of insertion of the anal canal should be slow, so as not to damage the rectal mucosa. 5, pregnant patients should be used with caution, menstruation do not enema during menstruation. Those with more serious perianal diseases should not use Chinese herbal enemas for the time being.