The main symptoms of conjunctivitis include a foreign body sensation, burning eyes, itchy eyes, photophobia, and tearing. When the inflammation of the conjunctiva spreads to the eyelids, it can cause swelling of the eyes. Important signs include conjunctival congestion, edema, exudates, papillary hyperplasia, follicles, pseudomembranes and true membranes, granulomas, pseudo-ptosis of the upper eyelid, and enlargement of the preauricular lymph nodes, among others.