as per your description, they are may be lipomas
(fat deposits). they usually found many. unless they increase in size within in short time, become painful, skin changes or fixed, and hard ( these are feautures warrenty immediate doctor attention . the main thing is they will come back after removal in the same area. so as your paediatrician told the child needs close observation. As a oncology nurse if you are still diellamma , the better thing is to do FNAC from the swelling.