Ocular congestion is clinically manifested as conjunctival or ciliary congestion. There are many reasons for such congestion. Because the conjunctiva is in direct contact with the outside world, it is susceptible to trauma or infection, and the conjunctiva itself, with its various natural defenses, both specific and nonspecific, can be irritated, resulting in various signs, including conjunctival congestion. If conjunctival congestion near the periphery of the white of the eye, including lid conjunctival congestion, is accompanied by a varying degree of increase in eye stool, conjunctivitis is generally considered to be the cause. If there is significant congestion near the periphery of the black eye, the inflammation has spread to the cornea or iris-ciliary body, which may be caused by uveitis, glaucoma, or various intraocular diseases. If there is also localized tingling or a foreign body sensation, it may also be caused by irritants such as impingement, foreign bodies, or stones. Therefore, if you find obvious congestion in the eyes, pay attention to rest and observe whether there are other abnormalities in the eyes. If you find discharge, foreign body sensation, burning sensation, photophobia, tearing, pain and other symptoms, you should go to the hospital ophthalmology department in time.