Redness and congestion in the whites of the eyes can be caused by disease, or it can be related to certain medications, environmental factors or an improper lifestyle. 1.Diseases (1) Infectious diseases: common diseases include blepharitis, dacryocystitis, bacterial conjunctivitis, viral keratitis, infectious uveitis, etc., and the patients may have the symptoms of redness and congestion of the whites of the eyes. (2) Non-infectious diseases: blepharophimosis, inverted eyelashes, tear duct obstruction, dry eye, refractive error, conjunctival sac foreign body and other diseases, patients may also appear in the white of the eye red congestion symptoms. 2. Drugs: ciliary muscle paralyzing drugs such as atropine may cause allergic conjunctivitis and symptoms of redness and congestion of the white of the eye. 3. Environmental factors: sand, soil, flying insects and other foreign objects into the eyes, can cause eye discomfort, resulting in redness and congestion of the whites of the eyes. 4. Lifestyle: Looking at electronic screens such as cell phones and computers for a long time, or reading in poorly lit places, can lead to visual fatigue and symptoms of dry, red eyes. If you have symptoms of redness and congestion in the whites of the eyes, it is recommended that you go to the hospital to get a clear picture of the cause of the problem and follow the doctor’s instructions for treatment.