Tongue with a sense of fire may be dry mouth, burning mouth syndrome, candida infection, etc.. 1. Dry mouth: Whether physiological dry mouth, such as hot weather, low water intake, or pathologic dry mouth, such as dry syndrome, salivary secretion decreased significantly, will cause extreme dryness of the oral mucosa, and at the same time there is a sense of fire in the mouth. 2. Burning mouth syndrome: the tongue with a sense of fire may be a manifestation of burning mouth syndrome, mainly the burning sensation of the tongue, sensory abnormalities. The cause is not clear. 3. Candida infection: Candida infection in the oral cavity can also occur in the tongue with a sense of fire. There may be other pathologic factors, it is recommended to go to the hospital in time, complete the examination to determine the cause of the disease, under the guidance of the doctor to give targeted treatment or therapy.