Mouth wall red drooling may be caused by mouth ulcers, stomatitis, respiratory tract infections and other diseases. 1. Mouth ulcers: also known as aphthous ulcers, is a common disease of the oral mucosa, will easily stimulate the mucous membrane, salivary secretion, etc., resulting in the occurrence of oral wall red drooling. 2. Stomatitis: when the patient’s mouth occurs gingivitis, lingual inflammation, etc., will easily lead to the invasion of bacteria or viruses, causing the wall of the mouth red, pain and other symptoms. When inflammatory substances stimulate, it may lead to an increase in saliva and the phenomenon of drooling. 3. Respiratory tract infections: If the patient suffers from tonsillitis, pharyngitis and other diseases, it will easily lead to throat discomfort, difficulty in swallowing, resulting in the phenomenon of oral wall red drooling. Oral wall red drooling patients should go to the hospital in a timely manner to identify the cause of the disease and follow the doctor’s instructions, so as not to delay the condition.