No - well, there's no reason why they should, really.  I only ask because it once happened to a friend of mine.   They found him in the middle of the park one evening, stripped to the waist and howling at the moon, with his nipples glowing bright red.  He works in marine insurance these days, but this is probably irrelevant.

Your nipples are probably displaying an allergic reaction to something, so I'll arrange for some tests to be done at the clinic.  It's all quite painless.  They just rub you with various substances - margarine, vulcanised rubber, engine grease and so forth - in order to determine which is the allergic trigger.

I had another friend whose nipples were allergic to granite, although it never seemed to bother him that much.  Quite the reverse in fact, as he seemed to get some sort of vicarious pleasure from the affliction.  They caught him one morning with his jumper rolled up, pressing his chest against the east wall of the public library.  It was all over the papers.  I believe he's now an undertaker but, once again, I imagine this is of little consequence.