What Could Itchy Rashes On Forehead And Ears Of An Infant Indicate?

My son is six months old. At two months a rash started on his forehead and has not gone away. Doctors are telling me its due to hormones and it will go away in a couple weeks. They have been saying this for four months now. They said to put alot of hydrocordizone cream on it and it will go away. The cream works while using it, but as soon as you stop it comes right back. This rash is just on his forehead and goes to his left ear sometimes too. It itches him terribly and causes him to scratch himself all the time. He is also biracial and the hydrocordizone cream will start to mess with his skin pigmintation . Have you heard of anything like this? Can you make any suggestions? Ive tried coconut oil, head and shoulders shampoo.