Keratitis is always bad, usually due to the use of the wrong medication, or the patient’s presence of dry eye, or eye hygiene and physical condition. 1. Incorrect medication: There are many different types of keratitis: keratitis caused by bacterial infection, keratitis caused by viral infection, immune keratitis and so on. If the medication is not appropriate, it is easy to cause the treatment effect is not good, the keratitis will not be cured: bacterial keratitis with antiviral drugs, immune keratitis with antibiotics, will not achieve good treatment results. 2. Dry eye: If the patient has dry eye, it will lead to poor health of the eye surface, which is not conducive to the repair of keratitis, and will also cause keratitis to remain untreated. 3. Eye hygiene or constitution: if the patient does not pay attention to eye hygiene, eye contamination occurs, or personal constitution is poor, malnutrition, diabetes and other underlying diseases will also affect the recovery of the disease, should also pay attention to eye hygiene, enhance the constitution, treatment of primary disease. Keratitis is always bad, should go to the regular hospital, under the guidance of the doctor for standardized treatment.