Dry eyes may cause eye swelling and pain, but not all eyes swelling and pain are caused by dry eyes. Dry eye syndrome is mainly caused by low tear production or poor quality of tears, resulting in an unstable tear film that causes dryness and soreness on the eye surface. If the degree of dry eye is severe, there may also be a foreign body sensation in the eye, and there may even be swelling and pain in the eye and loss of vision. If the swelling and pain are obvious, or if the loss of vision is obvious, and if headache and dizziness are driven, it may not be caused by dry eye, but may be related to glaucoma. Therefore, if you have eye distention, you should also go to the hospital for examination in time to exclude more serious lesions, such as glaucoma or iridocyclitis, and after the exclusion of lesions, you should perform the corresponding dry eye examination to be able to determine whether you have dry eye, and if the distention is caused by dry eye, you can usually recover gradually by using artificial tear drops, such as sodium glass acid.