So our Dr. told us our son had MASTOCYTOMA. They are little red bumps that spare the hands, soles and face. He has about 11 of them. When rubbed they get white and very puffy.
We were referred to a dermatologist (we had to drive a ways) who was familiar with this. It's a rare "disease" among children that should fade when they are teens.
Basically what they are are benign tumors having a allergic reaction. silly, sounds scary the way it's worded.
When they turn white and puffy after being rubbed they are sending huge untold numbers of histamines throughout the body that could cause the child to flush all over and lose consciousness..we are supposed to have an epi pen at all times. HOWEVER< having mastocytoma is EXTREMELY rare, and the losing consciousness even rarer still!

We haven't had to go to the Dr. for him (he's 17 months) for quite a while, however this morning we noticed that one of the spots on his back looked like it was going to burst open, like a boil almost! So I searched on here and found your thread! I called the Dr's and am of course awaiting a return call... What did you DR/ Derm say? How's your son? I hope all is well!