I live in a loft apartment that I am still very much in the process of renovating. It is going to be great when it is done, but I hadn't taken into account that the diagonal roof could very easily be turned into a hazard. I have already bumped my head on the sharp edge leading up to my kitchen more than once. Yesterday night, I bumped my head again and it hurt a lot. I was bleeding a lot as well, and I have been feeling nauseous and dizzy ever since. When do you think it is necessary to seek medical help for the side effects from head injuries? For what it is worth, my head looks fine now apart from a scab and a bit of a bruise, but I felt horrible at the time.