Unexplained Headache

Hello everyone. I have been suffering for a head ache for more than a month. I call it a head ache because it's more like my head aches than it is a headache. The ache is in the back of my head and is very dull. It is not pulsating or vice like. I have had a CT and a MRI, both negative. I am very discouraged as I do not know what is causing my headache. OTC medicines do not bring me relief. Has anyone experienced this type of ache?

I have the same thing. It started in october. I recall the day. 2 days later I noticed a tick bite. Unsure if related. 5 months of HA have not gone away. I wake up with them, 6 out of 10. tylenol, Advil no help. MRI MRA negative (no contrast). LP negative. Lyme screening was negative. Blood work negative so far. Very annoying.