The corners of the mouth will not remain cracked after the healing of xerostomia, but there may be slight pigmentation, which can be effectively relieved by timely skin repair. 1. Keratitis is mainly due to a lack of vitamins or infections and other causes of localized inflammation and redness of the corners of the mouth, but will not cause connective tissue and the body surface of the crack. After healing, there will be short-term hyperpigmentation, making the corners of the mouth obviously dark, but generally will gradually fade, and will not leave cracks. 2. After the stomatitis healing, you can apply vitamin E or lip balm on both sides of the mouth, which can effectively keep the body surface moist, thus promoting the fading of hyperpigmentation, and can also play a role in protecting the skin. At the same time in the inflammation after healing do not frequently tear off the surface scab or picking. After keratitis, appropriate nutritional supplementation and protection of the corners of the mouth can be effective in relieving the disease. If medication is needed, it is recommended that it be used carefully under the guidance of a doctor.