Thank you to all your replies. I'm glad to know I'm not the only person with this strange habit. (:

Rio...I just realised I only pick when I'm stressed/bored. I've got to find a way to keep my hands busy then. :]
>Kaika: I hate it when it bleeds...but whenever the scab bleeds I seem to feel marginally better- maybe it's the endorphins working?
>Perna: Thank you. The article helped! I'll try some of the tips in there.
>Christina: That's a point to ponder...now that I think about it I don't really get anything out of it...except maybe just a slight relief from whatever I'm doing right at that moment.
And yeah...explaining the scabs on my head to my aunt and my mother weren't good...and the bad thing is that my cousin seems to have this scalp-picking habit as well. Hers is still mild; so I don't want her to end up like me now. Guess my best option now is to figure out a way to stop this and hopefully, help my cousin as well. Either that or continue putting antiseptic cream, lol. (: