Current medical status: Some headache issues/concerns. 47yr-old male in otherwise good health. Sinus issues on and off all of my life. Annoying post-nasal drip for last few months partially resolved with 8 days doxycycline over Christmas period. Still have chronic throat-clearing problem even now. I coughed up a few bits of deeply unpleasant orangey/pastey purulous phlegm between Christmas and New Year. Some bad ear pain on and off last year. No previous history of chronic headache/migraine. ALSO: two months ago, mild orgasm headache (first I've ever had - not severe but rapid in onset RIGHT at THE moment - dull ache lasted an hour if that, but followed by a bit of nausea and clamminess - may have been panic-related (I have anxiety history) - for a couple of hrs thereafter). Ever since, I've had intermittent mild headaches for a couple of days and then not for a couple of days and so on (usually with light nausea - never lose my appetite). Always have a kinda full feeling in forehead and when I have the headache it's a low-grade headache with some light stabbing jolts in forehead a few times an hour. Often feels like mild toothache in my head. Doc not concerned, although I am! I've never had these kind of headaches before. I'm going to go for a self-funded (in UK Doc can't refer straight to MRI/MRA) MRI/MRA ASAP next week to see if anything untoward is going on - I'm anxious enough at the best of times! Headaches get worse thru day, aren't present on awaking and never awaken me. No worse if bending over or straining (kinda contradicts the sinus headache idea...) Eyes fine. No numbness. No consciousness impairment. No raise in ICP evident from eye exam. Some occasional subliminal ringing in ears.
Current medical treatment: none

There are several reasons for a headache: high blood pressure, eye problems, dental issues, migraine, brain tumor, temporomandibular joint disorder, inflammation of sinus. An ear, nose and throat specialist can exclude sinus as a reason. Your family doctor can measure your blood pressure. A brain tumor can be diagnosed using imaging techniques like Computer Scan and Magnetic Resonance Imaging.