Headaches affect nearly everyone at some point, but when they become chronic, they can have a debilitating effect on your life. A headache occurs when nerves send pain signals to the brain in response to certain triggers. Many different things can trigger a headache, such as specific foods and beverages, physical exertion, and poor posture. In some cases, they can be a sign of an injury or underlying condition, such as stroke, cancer, or a cerebrospinal fluid (CSF) leak.
There are over 150 different types of headaches, but these types are typically divided into two categories: primary and secondary headaches. The most common type of primary headache is tension-type headache, which is characterized by a sensation of pressure around the head that is felt most strongly in the forehead and temples. Other common types of primary headache are cluster headaches, new daily persistent headache (NDPH), and migraine.
Secondary headaches occur as a result of an underlying medical condition, such as a sinus infection. Most secondary headaches are not an indicator of a life-threatening illness or injury, but some, such as spinal headaches (caused by a CSF leak) and thunderclap headaches (caused by medical problems such as brain bleed or sudden increases in blood pressure levels), may necessitate emergency medical care.








