question: Hi. I have a seven year old son who has always been very active and healthy. Lately he has developed several red, swollen bumps on his legs. So far they have not moved above the knee. He reports no pain or discomfort when I press on the bumps. He has had a few little scrapes lately that seem to take longer than normal to heal, but other than that, no changes in overall health. What could be going on? Thanks, Amanda