A hot and spicy mouth may be caused by eating too much spicy food, stomatitis and burning mouth syndrome. 1. Eating too much spicy food: patients eat too much spicy food, which will stimulate the skin mucous membrane of the mouth, resulting in the phenomenon of hot and spicy mouth. 2. Stomatitis: due to bacterial infection or lack of vitamins, which leads to inflammation of the oral cavity, the oral mucous membrane changes, which will cause the patient’s oral cavity hot and spicy phenomenon. 3. Burning Mouth Syndrome: When patients suffer from burning mouth syndrome, the main symptoms include change of taste, dry mouth and hot and spicy mouth. Patients with oral hot phenomenon, it is recommended that patients go to the regular hospital stomatology examination, and according to the cause of standardized treatment, the use of drugs need to follow the doctor’s instructions.