Cracked corners of the mouth have not been healed may be related to the usual habits, but also may be the emergence of keratitis and other diseases, the need for dietary modification or drug treatment. 1. habits, if you do not pay attention to personal dietary care, often eat spicy and stimulating food, drink less water, may lead to dry corners of the mouth, so the corners of the mouth cracked has not been healed symptoms. Usually need to maintain a light diet, eat appropriate food containing vitamin C, vitamin E more food, fall and winter seasons, it is best not to lick the lips with the tongue often. 2. Keratitis: patients with keratitis due to the corners of the mouth are infected, may lead to cracked corners of the mouth has not healed, but also accompanied by redness, swelling, pain and other symptoms. You can use medication under the guidance of a doctor, such as 0.1% ethacridine solution, erythromycin ointment and so on. Usually the use of medication must consult a doctor, but also need to observe the individual body recovery.