My sister (11 months old) has been pinching herself a lot. Not to the point of making it red or hurting herself but pinches whenever she has a free hand. We ry to push her hand so that she doesn't pinch herself but she doesn't stop, she even pushes our hands. I have very little knowledge for OCD and it might have nothing to do with it, but I prefer to be wrong than to say I didn't try anything. If anybody knows what this is, if it can be stopped or she will grow out of it please do tell.