There are multiple types of headaches. Most people have probably heard of migraines. These typically involve a throbbing pain with sensitivity to light and noise and may also include upset stomach. Tension-type headaches are more of a dull ache with the feeling of a band around your head. Cluster headaches are so called because they occur in groups over a period of time. For instance, they may occur multiple times in a week and then disappear a while, only to recur later. Oftentimes cluster headaches are felt only on one side. Some headaches have more interesting names, like thunderclap headaches, which you can read about here. Head pain can be caused by trigger points (tight areas in muscle) that refer pain over the top of the head, around the eyes, and other typical patterns. You can see and example here. Problems with the jaw joints are sometimes associated with headaches too. With so many types and causes of headaches it is important to seek help from a medical professional if you experience them.