I'm happy that you have asked me to assist you with your child and hope that you can benefit from my many years of helping parents like you.
Has his doctor looked at the spots and does he have a history of cradle cap (seborrhea on his scalp)?
I'll watch for your return to JustAnswer with your reply.
He saw my GP but the spot had gone down but this is a new spot which is quite large, he does have some cradle cap on his head. I normally use dentinox cradle cap shampoo to try and get the cradle cap out which normally helps.