hi, i have an 8 year old son, he just told me about a little knot probably as big as my fingertip underneath his skin, in the area right below his armpit but not far down his side. kind of feels like a little hard bubble that moves around a pit when you touch it.
Hi, From history it seems that there might be having enlarged axillary lymph node giving this problem. He might have some cut or minor injury in his arm and having some minor infection causing this node enlarged. If there is infection on hand go for its treatment after consulting your doctor. Ok and take care.