The redness and congestion of the eyes may be caused by non-disease factors, or it may be related to pathological factors such as conjunctivitis, iridocyclitis, acute glaucoma and so on. 1. Non-disease factors: bad eye habits, such as often rubbing the eyes, staying up late, overuse of the eyes can cause redness and congestion of the eyes, and the symptoms can be gradually relieved after developing good eye habits. 2. Pathological factors: conjunctivitis is caused by microbial infections, allergic reactions, etc., in addition to causing redness and congestion of the eyes, but also increase eye secretions, foreign body sensation and other discomfort. Iridocyclitis is related to infection and autoimmune factors, which can lead to symptoms such as redness and congestion of the eyes, tearing and photophobia. Acute glaucoma attacks can also lead to red, bloodshot eyes and eye pain. If the symptoms of redness and congestion cannot be relieved by resting, it is recommended to consult a doctor as soon as possible to clarify the cause of the congestion and then actively cooperate with the doctor to avoid delaying the condition.