Sorry for this subject matter but I don't want to rush to the doctor unnecessarily. Recently I have discovered that my son has a dark purple penis head, I am a little shocked at the colour. He doesn't complain of any pain but I am so worried about the colour. Is it normal? A few mothers have suggested I tell him to pull the skin back in the bath, but I don't understand why it won't just stretch over by itself. (my husband is circumcised so he doesn't know what to do either really.)