One eye is swollen and a little sore, most likely due to bacterial infection of the blepharitis, especially if the eyelid is red and swollen, and pressure is painful, and blinking is accompanied by pain in the red and swollen area, a bacterial purulent inflammation, also known as mydriasis or pinhole. Most of the infections are caused by Staphylococcus aureus, but other types of positive cocci may also cause bacterial infections, commonly due to poor eye hygiene or decreased body resistance, such as frequent late nights, drinking or straining, can be triggering factors for this condition. It is usually necessary to use anti-inflammatory drugs for local treatment, using levofloxacin drops or tobramycin eye drops for local anti-inflammatory treatment, and also oral antibiotics, such as cephalosporin or amoxicillin type of oral drugs, combined treatment effect will be better.