I appologies for the very late reply,I've been on a long vacation and my Professors and Colleagues on the website have been doing agreat job keeping up with the enormous amounts of daily posts. Thankyou for using our site and I hope I will be of help to you.
Regarding your condition, Does your hair hurts the most on combing it, or it hurts all the time?! is it at the fron of your scalp or all over your scalp!? and you are neither diabetic nor hypertensive,right?
If you do a random blood sugar test and a lipid profile,and something like ESR, we can attribute your headaches to something called temporal/giant cell arteritis. Its treatment is corticosteroids but the only definative confirmation of the disease is a biopsy,but let's not jump into conclusions before we underline what we have first.
temporal arteritis can present with attacks of headaches(moderate to severe),jaw claudications(pain in the muscles of mastication),arthritis,etc since it can be categorized as an autoimmune disease.But at the end of the day it can be controlled. I don't think it is related to a brain tumor though. If you have a family history of cancer and you want to do a CT scan of the brain with contrast that is fine,but not necessarily unless you are at risk.