Some is always as a result of stress most especially if it we felt it at the frontal side of the head, doctors may recommend that you take painkiller and some doctors may administer some sleeping pill for you to get enough sleep if necessary, most of them are not always sign of something serious, but it is always the best for us to see a doctor if it persists for a long time, then the doctor will be able to diagnose the problem and give you possible drugs for you to get yourself treated. That's how I understand it.