Keratitis includes infectious keratitis and endogenous keratitis, infectious keratitis is contagious and endogenous keratitis is generally not contagious. Infectious keratitis is mainly caused by bacterial, viral, fungal and other microbial infections, and is generally contagious, while endogenous keratitis such as autoimmune disease rheumatoid arthritis, vitamin A deficiency-induced keratitis is generally not contagious. Keratitis patients often manifested as eye pain, photophobia, vision loss, increased secretion and other manifestations, should be timely consultation, treatment under the guidance of the doctor, daily attention to eye hygiene, infectious diseases, pay attention to isolation, eat a light diet, avoid spicy and stimulating food.