Molly had something like that but they were more on the middle of the inside, but they looked like little pimples, my vet said to put benadryl cream on them... it cleared them up just fine, but the funny thing is that she only got them when it got close to time to go to the vet. I always thought they had something to do with stress ?!? He didn't seem too concerned with them and come to think of it I haven't seen them since she finished all her puppy shots! hope she clears up soon!