The patient’s left eyebrow pain may be caused by physiological factors, trauma, neurological headache, glaucoma and other reasons. 1. Physiological factors: usually, if the patient is overworked, overuse of the eyes, often the symptoms of pain in the eyebrow, usually after resting can be relieved, which is a physiological phenomenon. 2. Trauma: If the patient’s eyebrow is impacted or squeezed by external forces, pain, redness and swelling may occur at the damaged place. If the eyebrow trimmer is not used properly and scrapes the eyebrow area, pain at the arch of the eyebrow will occur. 3. Neurogenic headache: the cause of neurogenic headache is not clear, it may be related to excessive caffeine intake, excessive greasy food intake, excessive smoking, excessive alcohol consumption and other factors. Patients often have tightness, pressure and heaviness in the head, mostly in the orbital or forehead to show throbbing, swelling, throbbing pain and other discomforts. 4. Glaucoma: Glaucoma patients with elevated intraocular pressure, eye swelling and pain, headache on the same side, nausea, vomiting and other discomforts. It is recommended that patients with obvious headaches consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment. Usually, patients should also pay attention to more rest, reasonable use of eyes.