Tongue coating: most people with damp-heat have red tongue, yellow or yellow greasy coating and thick yellow. People with cold and dampness constitution are mostly pale tongue with slippery fur, or white and greasy fur. Stool: The stool of patients with damp-heat is poor in viscosity or dry. People with cold and dampness have thin stools and are not shaped. Urine: wet and hot people have yellow urine, and cold and wet people have white urine. Diet: People who are hot and humid like cold drinks, and the food is cold. People with cold and wet constitution like hot drinks, but they feel uncomfortable after eating cold ones. Look at the tongue coating, if it is cold and wet, the tongue is reddish and the tongue coating is white; However, the damp and hot tongue is red and yellow. Usually the diet is cold, which is a damp-heat syndrome; Usually like to eat hot, cold and wet. Look at the stool, if it is wet and cold, the stool is thin but the smell is not obvious, and the color is light; If it is hot and humid, the stool will be sticky, smelly and black.