Redness and swelling at the corners of the eyes may be caused by poor rest, blepharitis or eye trauma. If the patient often stay up late, long-term sleep deprivation, eye due to excessive fatigue can produce the symptoms of redness and swelling at the corners of the eyes, can also be accompanied by eye soreness, dryness and other symptoms of discomfort. Blepharitis refers to suppurative inflammation of the eyelid glands, which can occur in the eyelids near the corner of the eye, under the stimulation of inflammation, the patient can appear red and swollen at the corner of the eye, but also eye pain, photophobia, eye discharge and other uncomfortable symptoms. If the corner of the eye is traumatized, the local soft tissues will be congested and edematous, which can also lead to redness and swelling of the corner of the eye. It is recommended that patients with significant redness and swelling of the corners of the eyes should seek medical attention to evaluate their condition and follow the doctor’s instructions for treatment.