Common causes of right-sided headache include migraine, cervical spondylosis and right-sided brain trauma. 1. Migraine: it is a kind of recurrent vascular headache with throbbing headache, mostly on one side, but also on both sides, in which the pain mainly on one side is common. 2. Cluster headache: it is a primary neurovascular headache, manifesting as episodic severe pain around the orbit on one side, characterized by repeated intensive attacks, accompanied by autonomic symptoms such as conjunctival congestion on the same side of the eye, tearing, pupil constriction, eyelid ptosis, as well as sweating of the head and face, which often occurs at a fixed time of the day, and may last for several weeks to several months. 3. Trauma to the right side of the brain: If the right side of the brain is traumatized by hard objects, external blows and falling from a height, the local blood vessels and nerves will be damaged, so it will produce the right half of the headache. If the right side of the headache, to go to the regular hospital in time to identify the cause of the disease, and under the guidance of a professional doctor to choose a suitable method of treatment.