Keratitis is one of the more serious diseases of the ocular surface, and recovery time depends on the type and severity of the disease, usually ranging from as little as 1 week to as long as several months or more to heal. There are many types of keratitis, such as infectious keratitis, including bacterial, viral and fungal keratitis, and bacterial and viral keratitis usually heal in about 2 weeks. Non-infectious keratitis, such as filiform keratitis, can get better in 1-2 weeks. And keratitis caused by trauma, such as minor abrasions, can return to flatness in about 1 week. For keratitis caused by internal causes, the specific recovery time is related to the severity of the primary disease and the patient’s resistance. Patients with keratitis need to pay attention to eye rest, consume more fresh vegetables and fruits, less fried food, and abstain from smoking, alcohol and other stimulating foods, pay attention to supplemental nutrition, and enhance immunity, so as to shorten the healing time.