question: my 6 month old nephew has purple dots on his forehead. They were on his nose but moved to his forehead. A few days ago he had a red rash all over his body, that faded some but it came back again last night after the purple dots appeared on his forehead. His temperature is fine. The doctor prescribed benadryl and my niece, his mom, gave him that. It helped him sleep but he still has the dots. what is wrong with him.