Uncomfortable and swollen eyes can be caused by overuse of eyes, eye allergies or dry eye. 1. Excessive use of eyes: long-term excessive use of eyes will certainly cause eye muscle tension, eye muscles are very tense state will cause visual fatigue, thus appearing uncomfortable eyes can not open the situation of swelling. 2. Eye allergies: eye allergies caused by eye contact with cosmetics or dust, allergens stimulate eye discomfort, resulting in eye swelling and inability to open the phenomenon. 3. Dry eye: due to long-term late night or frequent use of electronic products, resulting in reduced tear secretion of the eyes, tear power abnormalities, thus appearing dry eye, usually dry eyes, soreness and other symptoms, but also the phenomenon of eye swelling can not open. The situation of eye discomfort and swelling can not open the eyes, may also be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, to give targeted treatment or treatment. Do not overuse your eyes to avoid aggravation of the condition.