I don't know whether this is a tic or not as I am in control of it but most often do it without realising it. But it is like an urge. I am always having this urge to blink all the time, and every day I have headaches because of excessive blinking. I also have to do it tight too. I don't know why I do this but I've been doing it since my early teens and I wish that I could stop blinking so much. Idk if it's because I'm tired all the time, or what. iin?