When the tongue is scalded by boiling water, the recovery time varies depending on the area scalded and the amount of boiling water. If it is only slightly scalded by boiling water and the area is relatively small, the symptoms can disappear after 2-3 days. If it is a large mouthful of scalding water, and can not spit out the water in time, but also swallowed in. In this case, not only the tongue is scalded, but also all the mucous membranes of the entire pathway of the throat and esophagus are scalded. If the area is relatively large, it can be fully recovered in about 7-10 days. It is also important to pay close attention to the fact that the scald may cause ulcers or infections afterwards, and symptomatic treatment is required. When drinking water, patients should first feel with their hands whether the cup holding hot water is very hot, and if it is freshly boiled water, wait for it to warm up before drinking. Also, rinse with warm water after scalding to make the temperature drop quickly. After scalding, you can apply scalding medication locally and apply chlorhexidine mouthwash to rinse your mouth, pay attention to local cleanliness and hygiene to prevent infection.