I have a question about mole on scalp? just need help, thanks?

Moles are a touchy subject. When you run it over with the comb, its causing damage to the tissue around and underlying it. If its growing as you age, you may need to make an appointment with a dermatologist. He will biopsy it in the office, and will send it off for evaluation. Peeling and flaking isn't out of the ordinary, but it is of concern because you seem to catch it when brushing your hair. Malignant moles are usually dark, grey and purple colored in some instances. I have seen melanoma in one case that was white. IM NOT IN ANY WAY SAYING THATS WHAT YOUR IS, SO TAKE IT THAT WAY. Please just make an appointment for that peace of mind.