The causes of red eyes with blisters include conjunctivitis, lymphoid follicles, blepharospasm and so on. 1. Conjunctivitis: such as wearing contact lenses for a long time, rubbing the eyes, etc. can easily lead to conjunctivitis, resulting in conjunctival edema and blisters. Conjunctivitis, its manifestations are various, the common symptoms are redness of the eyes, increased secretion, foreign body sensation, tearing and other uncomfortable symptoms. 2. Lymphoid follicles: The formation of lymphoid follicles by the retention of conjunctival lymphatic fluid will cause lymphatic fluid to pool in the conjunctival tissues, forming a small blister that is relatively confined, round, relatively neat, and with a sharp edge. 3. Blepharospasm: due to aging, bright light stimulation or wind and sand stimulation and other factors, resulting in localized conjunctival tissue hyperplasia and formation, the appearance looks like the formation of blisters in the white eyeball, and if there is an infection, it will lead to redness. This kind of blepharospasm, which usually does not disappear on its own and even increases slowly, will not affect the structure and function of the eyeball or cause vision loss. Red eyes with blisters may also have other causes, 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.