I have been suffering from throbbing headache. It triggers whenever I am involved in problem solving or thinking related activity. Once it begins it continues for a long time until I take long hour of sleep. It has been happening since the end of April. Whenever it occurs I have stiffness in neck and I wish to discontinue my work which is hampering my studies. I feel a lot of pulling sensation in head, forehead and this sensation keeps on moving from left to top, right in any order. It reduces my thinking ability. Can you please suggest how to cure it and what might be its cause.