The mouth, tongue on fire, blistering may be suffering from mouth ulcers, mouth ulcers are generally due to B vitamin deficiency caused by the drug treatment can be used watermelon cream spray and oral vitamin C, vitamin B2, etc., to help the healing of mouth ulcers. In terms of diet, you should mainly eat light, more green vegetables, fruits, eggs, milk, etc., and less spicy and salty food, so as not to stimulate the ulcer aggravate the disease. Also in daily life must also develop the habit of early to bed and early to rise, to ensure sufficient sleep, because staying up late can easily lead to fire and mouth ulcers, so early to bed and early to rise, to ensure that there are at least 8 hours of sleep every day, must not stay up late, so as to recover more quickly.