About a week ago, DS (7) had a blister on the side of his thumb. He says he didn't burn it or rub it, and I can't think what he might have burnt or rubbed it on. After a couple of days, it popped with no interference from us and healed nicely. However, today DS said "look, my blister's coming back!" and it is... a new blister is coming up in exactly the same place. Again, I can't think of any way that he's hurt himself - he's pretty vocal about injuries! So, it's a weird one, two blisters in the same place with no apparent cause.
Has anyone else experienced this? Should I be worried? In general, he's in very good health. He has had the occasional skin condition before, eczema (though he's mostly outgrown that now), veruccas and warts and ringworm...might this be related to any of those?