my friend's daughter gets rashes when she has citrus. could be food allergies or i wonder if the sugar is feeding the rash, if it's yeast, hence the flareup? yeast doesn't have to be moist. i currently have an infection near my nipple. i wouldn't say it's moist in there (not bf'ing).
have you done any googling? see if this link helps you narrow it down: http://www.chiff.com/health/rash-pictures.htm#