Neuralgia on one side of the head is mainly seen in migraine, trigeminal neuralgia and occipital neuralgia. 1. Migraine is mostly seen in female patients, the cause of which is unknown. Patients may have blurred vision, visual field loss and other aura symptoms before the onset of the disease. 2. Trigeminal neuralgia is mainly caused by the compression and stimulation of the blood vessels in the intracranial segment of the trigeminal nerve. Patients with occipital neuralgia are mostly located in the posterior occipital region, mostly due to various stimulation of the occipital nerve at the outlet of the occipital nerve, and in addition to pain in the posterior occipital region, patients may also have scalp sensory disturbance in the posterior occipital region.