Redness and pain at the tip of the tongue may be caused by improper diet, ulceration of the mucous membrane at the tip of the tongue, lack of trace elements, vitamins and other factors. 1. Improper diet: If you eat too much spicy and stimulating food or food with too high temperature, it will easily cause irritation to the mucous membrane of the tongue, resulting in redness of the tip of the tongue, accompanied by pain. 2. Mucosal ulcers at the tip of the tongue: If the tip of the tongue is red and painful, it is considered to be a mucosal ulcer, which may cause localized congestion and redness at the tip of the tongue, and is accompanied by painful symptoms. 3. Lack of trace elements and vitamins: when the human body lacks trace elements and vitamins, such as iron, zinc, folic acid, vitamin B, etc., it is easy to lead to mucosal ulcers on the tongue, causing redness and pain at the tip of the tongue. 4. Candida infection: the symptoms of redness and pain at the tip of the tongue are usually caused by Candida albicans infection, and Candida mycelium can be detected in pathological examination. Patients with tongue tip redness and pain should go to the hospital in time, after clarifying the cause of the disease, give appropriate treatment and therapy under the guidance of the doctor.