hi Dr Rajput,
Thanks for your reply, the headaches are not migraine, and I don't think they are an allergic reaction as I have them constantly to some degree.
It is not like a normal headache but just in one spot in the middle of my forehead. I do try meditation and this helps sometimes although I do think there is a specific cause of the headache, it feels to me as though it could be a trapped nerve.
Hi, welcome to the forum, headache you are is atypical type. Firstly, migraine can be suspected, if so the triggering factor for your headache like specific food, smell etc has to be ruled out. The other possibility is there may be some brain pathology.
As you have already gone through various CT and MRI scans, which rules out the brain pathology. Another possibility can be chronic daily headache (CDH) wherein headache presents for more than 15 days in a month. This usually happens due to over use of analgesics. In such cases you should restrict the use of analgesics.
You have to start relaxation exercises, hot and cold bath, enough sleep, lifestyle changes, stress management skills etc. Triptans, tricyclic anti depressants against prescription will help you. I suggest you to consult neurologist and undergo examination. Take care and regards.