Headache in the back of head?

I had a headache in the back of my head that wouldn't go away and morbid thoughts (death, etc.) I had been on a crash diet. I bought a VITAMIN B COMPLEX at the drugstore. Within 3 days I was feeling great again. Doctors couldn't figure out what was wrong with me. Finally GOD showed me what was wrong with me, really.

Tension-type headaches frequently manifest at the back/base of the head and in the neck. These are characterized by the sensation of dull but constant, non-throbbing pressure. They can be caused by general stress/anxiety, irregular eating habits, overuse of tobacco or alcohol, sleep deprivation, or other factors.

Some types of migraines also manifest at the back of the head. These differ from tension headaches in that the pain is more severe and prolonged, and tends to be made worse by routine physical activity (e.g., the pain sharpens notably during or after physical exertion).

Most of these headaches can be treated effectively with over-the-counter pain medication; ibuprofen is particularly recommended for tension-type headaches. But if your headache persists for more than a few days, you should seek medical attention, because chronic headaches in this area could be the result of a potentially dangerous underlying condition, not to mention that they can impair your ability to function normally.