A headache is pain that occurs in the region of the head or neck. It can be a symptom of a number of different conditions of the head and neck.
There are over 200 types of headaches, and the causes range from harmless to life-threatening.
The most common types of headache are the “primary headache disorders,” such as tension and migraine headaches. Migraine has symptoms of pulsating throbs affecting one side of the head, experiences of nausea at times, and usually lasts between 3 hours and 3 days.
“Secondary headaches” may be caused by problems elsewhere in the head or neck. Depending on the symptoms of the pain, some secondary headaches may or may not be harmful. For example, pain from the neck muscles and taking excessive painkillers for headaches are not harmful. On the other hand, secondary headaches may be life-threatening or may cause long-term damage including headaches that occur within minutes, inability to move a limb or abnormalities on neurological examination, and among many other symptoms.