The one that got so big started from my robe belt knot pressing in to my side while i was sleeping. I got a huge flare from that then it blistered then it turned in to like a blood blister- horrible looking. now it is almost gone but it was terrifying. Now I make sure none of my clothes are going to irritate me. I cant stant that this alloydina can cause this is just all so bizzare. thanks for the hugs same back to you, cz