A few days ago my 7 yr old son began complaining of sore spots on the pads of his fingers. Upon examination, I notice perfect round red spots on a couple fingers of his right hand- in the exact spot where u would take a fingerprint. Today, I noticed that he has one of theses spots on each of his fingertips, but not thumbs. The spots resemble burn marks, as if he had laid his fingers flat against a hot surface. They are sore to the touch and a couple of them now have small blisters in the middle- one of which broke open. I was thinking it might be something viral, but he has no other symptoms- no fever or malaise. Any idea what could be causing this? Should I have him examined by a physician?