hello, i've been using the HM laser comb advance 7 for the last 3 weeks, and my head has been very, very itchy. looks like i see small little bumps on my head. maybe due to scratching it real hard. is this normal, and what should i do? i don't want to spot using this… but im afraid my head might not be able to handle this comb.

i did the sensitivity test on my skin, and also my neck and they were fine. please answer… =/