Numbness of the tongue when coughing may be related to physiological factors, which is normal, but may also be caused by burning mouth syndrome, allergies, etc. It is recommended to consult a doctor in time to clarify. 1. Physiological factors: If the patient eats irritating foods such as chili, mace, peppers, garlic, etc., a cough and numbness of the tongue may occur. 2. Burning Mouth Syndrome: It refers to a group of symptoms occurring in the oral mucosa, with burning-like pain sensation as the main manifestation, which can be manifested as numbness of the tongue, no skin sensation, tingling sensation. When the oral mucosa and throat are dry and uncomfortable in this type of patient, it can cause coughing, and there is a numbness of the tongue triggered by this disease. Therefore, numbness of the tongue when coughing may be a manifestation of burning mouth syndrome. 3. Allergy: Numbness of the tongue when coughing may be caused by the tongue coming into contact with allergic substances such as mango, eggs, pineapple and sulfa drugs. When the tongue comes into contact with allergens, symptoms such as numbness and swelling may occur, and some patients may also have a coughing reaction. Presence of the above factors and exclusion of physiologic factors should lead to prompt medical attention for a clear diagnosis and appropriate treatment if necessary.