Headache, that dull aching pain we feel in our head is a result of signals interacting throughout the brain, blood vessels and nerves. These nerves send pain signals to the brain. Most headaches go away on their own and are not a sign of anything serious, or are anything to be too concerned about. They are a very common, and the majority of people will experience a headache many times during their lifetime. The main symptom of headaches is a pain in your head or face, the pain you can experience may feel like a throbbing, sharp or dull ache. Headaches can be the result of dehydration, physical health factors and mental health issues.