M.G.
Not sure how long you've been on a paleo diet but if it is something you haven't been doing for too long perhaps your body is purging the toxins from itself? It is of course also very possible to have a hormone imbalance. Also, if you are on any medications(vitamins included)it is possible this could be an effect of those as well. When all else fails look to your doctor or naturopath to help find the cause and possible solutions.