Ulcers on the tongue are common in people with high stomach fire and high liver fire. High stomach fire is mainly caused by incorrect eating habits, due to the habit of eating greasy, indigestible food, or eating too much at every meal and not exercising enough afterwards, resulting in the body accumulating food for a long time, making the food stay in the stomach for too long, thus causing high stomach fire. Some patients suffer from digestive disorders or gastric ulcers, which can also cause stomach fire to flourish. When stomach fire rises to the inside of the mouth, ulcers can appear on the surface of the tongue. People with intense liver fire are also prone to ulcers on the tongue, commonly due to excessive stress in work and life, resulting in chronic mental anxiety and tension, or being irritable, depressed, and sulking.