There are two possibilities for pain at the side of the eye: first, blepharitis, which is an inflammation of the surface of the lid margin, eyelash follicles, etc. It is generally associated with bacterial infection, chronic conjunctivitis, refractive error, malnutrition, visual fatigue, long-term use of poor quality cosmetics, poor hygiene habits and decreased body resistance. Clinical manifestations include pain at the lid margin, burning sensation, irritation, itching, flushing of the face and face, and requires treatment for the cause, such as correction of The treatment of conjunctivitis requires a good lifestyle and hygiene habits, and a reduction in the stimulation of tobacco and alcohol. You can clean the roots of the eyelashes with saline, apply tobramycin dexamethasone eye ointment, and take oral B vitamins. Second, blepharitis, at the lid margin can manifest pain, redness and swelling at the edge of the eye, requires hot compresses three times a day for 10 minutes each time, application of levofloxacin hydrochloride eye gel, oral anti-inflammatory medication, and if the redness and pain is reduced you can do massage in the direction of the lid margin.