What causes cracking sound in knees of a child while bending them?
Patient: Hi, my son is 9 year old. I just noticed that his knees makes some cracking sounds when he bends them.... he expiriences no pain or discomfort. He is an active child,I was wondering if this is normal or are there any concerns I should worry about? Thanks Doctor: Hi, cracking sound at knee joints while bending in a 9 year old child can be normal or due to calcium deficiency. In my opinion, you should do calcium and phosphate levels in child with x ray wrist to look for rickets. If calcium deficiency is found than child will require calcium syrup for 3 months. Revert back with above reports. Take care.