Warm water can be used to flush the anus. Warm water can clean the anus, promote blood circulation and relax the sphincter. 1. Clean anus: Warm water rinsing anus can effectively remove the residual feces, digestive fluids and sweat from the anus to ensure that the anus is dry and clean. 2. Promote blood circulation: appropriate use of warm water to flush the anus, can make the blood vessels in the anal area expand, accelerate blood circulation, when suffering from perianal disease, can improve the discomfort symptoms, promote healing, because it can be made around the anus to get more oxygen and nutrients. 3. Relaxation of sphincter: warm water can also make the anal sphincter relaxation, thus effectively reducing the pressure, can effectively relieve the symptoms of anal sphincter spasm. Wash the anus should pay attention to the water temperature, to avoid the water temperature is too cold or too hot on the anus caused by stimulation; anal bleeding and other discomforts, please consult the doctor in a timely manner, active treatment, so as not to delay the condition.