Headache MedicineAbout This Hardback Headache is the pain in the face, head or neck. It can occur as a migraine, tension type headache or cluster headache. There are various causes of headache. These include dehydration, fatigue, sleep deprivation, stress, the effects of medications, the effects of recreational drugs, viral infections, loud noises, common colds, head injury, etc. In severe headaches, there is a high risk of depression. Its treatment depends on the