Hello! My hair is 2c/3a and I find random super coarse black hairs on my head usually near my part. These strands are usually super curly (3cish) and they are like frizz. I notice that if I pull one out of my scalp, it has a black-ish bulb thing on the top instead of the normal white with my other hair. I always have an urge to pull them out, but I try not to. It's just so hard not to! Why do I have these strands and how do I keep myself from pulling them out?