hello doctor... my son is 2.5 year old and some time the sound comes from his bones, what should be done?

A. hi if a child is growing well ,I mean showing no discomfort then it is ok. otherwise better to check for calcium deficiency. At home , avoid giving RO water as it can cause Vitamin D deficiency give sunlight atleast 20 minutes a day which is good for vitamin D formation give gentle massage with Babyhug massage oil.