Eye swelling and pain in summer may be caused by overuse of eyes, sunlight stimulation, conjunctivitis and other factors. 1. Excessive use of the eyes: the high temperature in summer will lead to excessive congestion of blood vessels around the patient’s eyes, if the patient uses the eyes for a long time, it is easy to cause eye fatigue, which can lead to the patient’s eye swelling and pain. 2. Sunlight stimulation: Because the summer sunlight is more blinding, if the patient looks directly into the sunlight with his eyes, his eyes will be more strongly stimulated, which can lead to eye swelling and pain symptoms. 3. Conjunctivitis: If patients do not pay attention to local hygiene and cleanliness when using eyes in summer, it can lead to conjunctival infection, and under the stimulation of inflammation, patients can experience eye distension, photophobia, tearing and other uncomfortable symptoms. It is recommended that patients with obvious eye swelling and pain consult a hospital in time to assess their condition and follow the doctor’s instructions for treatment.