Causes of cluster headaches
The cause of cluster headaches is, despite a lot of medical research, unknown. However, it is thought that times of attacks have to do with the biological clock. Recent research shows changes in different areas of the brain, the hypothalamus. This is the area in the brain which manages the biological clock.
It is thought that during attacks, there is too much of a pressure difference between the blood supplying and draining arteries in the head. Because of the pressure difference and widening of the blood veins, pressure is supposedly put on the nerves, which leads to pain and other side effects of cluster headaches.
An attack can only be “provoked” during an attack period. Alcoholic drinks and vein widening medicine can be important triggers of cluster headaches. It is not proved whether food can provoke cluster headaches. When you suspect that food can play a role, you can keep a diary of what you eat and drink, to see if there indeed is a relationship. However, it usually seems to be because of coincidence.