Headache is a common problem, specially among the working crowd. Headache is caused due to several factors, but we can put it under three broad categories - 1.Tension – This is the most common cause of headache. Tension creates a spasm of the muscles at the back of the neck. The muscle spasm gets the tissues over the surface of the cranium and thus, the pain is felt not only on in the neck but also on the forehead. 2.Migraine – Migraine is the abnormality of the nervous system. This strain on the nervous system is caused due to eye strain, shock, stomach disorders etc. Migraine is a chronic disease which needs medical attention. 3.Cluster Headache – Cluster headaches are repetitive and gets back several times in a month. These are generally caused due to constant pressure on the nerves like alcohol consumption, chain smoking etc. Headaches are very disturbing and restricts your attention to the pain alone. At this moment pain killer seems to be the only solution to get relief f...