Conjunctivitis patients may have conjunctival congestion, eye pain, increased secretion, and if the condition is serious, it may lead to keratitis or lid adhesion. 1. Keratitis: Conjunctivitis is usually confined to the conjunctiva, if the infected bacteria or viruses are very virulent and the infection is not controlled in time, it will cause the infection to spread to the cornea, causing keratitis, and the patient may experience further aggravation of eye pain, as well as photophobia, loss of vision and other uncomfortable symptoms. 2. Lid adhesion: If the conjunctivitis is severe and repeated, the inflammation can cause eyelid scar formation, scar mechanization can lead to the patient’s eyeball and eyelid conjunctiva adhesion together. It is recommended that patients with conjunctivitis consult a hospital in a timely manner to assess their condition and follow the doctor’s instructions for treatment to avoid delays.