This topic discusses "private parts" in a medical sense, please don't read if you will be offended by this. Has anyone heard of this? Duckie has a history of unusual allergic reactions such as swelling, hives and canker sores. Another reaction that occurs infrequently is that her labia become bright red and burn. I know it's something allergic because it clears up quickly with an antihistamine (Benadryl or Zyrtec). The thing that bothers me is that I don't see this listed anywhere so I don't know what to call it. It usually happens when she gets a canker sore or has hives. I have mentioned it to the allergist and he agrees it is an allergic reaction through he advises me to watch for Urinary Tract Infection (UTI) symptoms just in case. Anyone have a clue what this is?