There are many reasons why stomatitis is recurrently bad for half a year, such as bad habits, improper diet and incomplete treatment. 1. Bad habits: patients like to lick their lips with their tongues for a long time, or rubbing or touching the corners of their mouths with other objects can lead to damage to the mucous membrane of the lips, which can lead to the recurrence of stomatitis for half a year, which is not good. 2. Improper diet: during the treatment and recovery of keratitis, patients like to eat spicy, deep-fried, spicy and other stimulating food, which will also affect the recovery of the condition, resulting in keratitis repeated half a year bad. 3. Incomplete treatment: Keratitis can also be related to factors such as not adhering to the medication and changing the dosage of the medication arbitrarily, which can lead to incomplete treatment, thus resulting in recurrent episodes of the condition that can’t be cured. There are many reasons for the recurrence of keratitis for half a year, it is recommended that the patient should correct the bad habits, follow the doctor’s instructions to take standardized treatment, do not private treatment, so as not to lead to adverse consequences.