Corneal ulcers generally do not heal on their own, and if patients receive timely scientific and formal treatment, their healing time may also vary individually due to factors such as etiology and degree of infection. Most corneal ulcers are caused by inflammation of the cornea that is not controlled in a timely manner, increased inflammatory infiltration, degeneration and necrosis of the corneal tissue in the infiltrated area, and loss of necrotic tissue. If it is a mild corneal ulcer, the scope is relatively small, recovery may be faster and can gradually return to normal in about 2-3 weeks. If the ulcer is deep, large or caused by fungal infection, it is more difficult to treat and the recovery time is relatively long, and it may develop into a prolonged corneal ulcer or even cause corneal perforation leading to intraocular infection, and patients need timely surgery. Therefore, once a patient has a corneal ulcer, it is recommended to go to the ophthalmology department of a regular hospital as soon as possible to receive standardized treatment and not to delay the condition.