I have a rash that started on my ears, then lower arms, then behind my ears, down my neck and to my upper chest area. The rash is very faint with tiny, pinhead, red bumps and itches like crazy! I am nursing a 3 month old and am wondering what I can take to relieve the itching and what in the world could be causing this... I have never been prone to rashes before. Thank you for your help!