Last Monday morning 3/16 I woke up with what I thought were bug bites. I had them on my buttocks, stomach, several on my arms and legs. During the week more popped out and I m not sure that they re done coming. They range in size from a pin head to a dime and are somewhat raised. They also have a tiny dot or bubble in the middle of the circle (rash)and I also have several canker sores right inside my lips. I last had this in August 2012 and even had a punch biopsy done to figure out what it was. No diagnosis. So, this is the second time that this has happened to me, although this time it s not as severe as the first time. What could be causing this?