Redness in the corner of the eye area is usually caused by conjunctival congestion, which can be seen in conditions such as visual fatigue, conjunctivitis, allergies, etc. Treatment measures will vary for different reasons. There are a large number of capillaries inside the conjunctival tissue. When the conjunctival tissue is subjected to adverse stimuli, such as the occurrence of visual fatigue, conjunctivitis, allergies, etc., the capillaries will fill up and dilate, and blood flow will increase. The capillaries will fill up, dilate and increase blood flow, resulting in conjunctival congestion, at which time the eye will become red, and the corner of the eye is the more common location for conjunctival congestion. If it is caused by visual fatigue, attention should be paid to correcting bad eye habits, caused by infection, according to the type of infection for anti-infection treatment, caused by allergies, need to get rid of the allergens as soon as possible, and you can order azelastine hydrochloride eye drops and other anti-allergy treatment. Red blood at the corner of the eye may also be other reasons, the symptoms continue to rest can not be relieved, it is recommended to seek medical attention as soon as possible, after a clear diagnosis, follow the doctor’s instructions to deal with, under the guidance of the doctor to use medication, do not use their own medication, in order to avoid adverse consequences.