Headache accompanied by eye distension, consider migraine, eye itself diseases, as follows: 1. Migraine: If migraine is located in the frontal and temporal areas, accompanied by eye distension, it is because there is more blood vessel dilation during migraine, which leads to increased blood flow in the skull, making intracranial pressure higher than normal, leading to a corresponding increase in intraocular pressure and causing distension; 2. Eye itself diseases: The most common diseases that cause eye pain are Glaucoma, especially acute closed-angle glaucoma, in which the intraocular pressure rises sharply and is accompanied by severe headache at the time of eye pain. Patients often go to neurology first for headaches, and doctors should be careful to identify them. If acute angle-closure glaucoma is left untreated, it can lead to blindness. If the doctor finds that the IOP is significantly elevated after the differential diagnosis, the patient should contact the ophthalmology department for emergency surgical treatment.