Recently, like a few months back, I've started getting a strange, bad headache, on my upper left part of my head. It feels nothing like a normal headache; it doesn't throb like a normal one, but just hurts. It feels like something is pushing inside my head. I have a problem with dust, and use to shake my clothes and head, to get it off. Could it be, this has caused bleeding? It's not like I shake it violently. I was outside, yesterday, and as always in the summer, there are lots of insects, so whenever I feel it's likely, I've got insects into my hair, I shake my head. Not all the time; just every now and then. Could this have caused me to get injuries inside my head? Alternately, does it sound like a brain tumour? However, I've heard you tend to faint with those, and I've never done that.