Hello, first of all, I suggest you go to a regular hospital to check the trace elements to see if there is calcium deficiency. Normal babies are calcium deficient. Most of the chest changes are osteoid tissue hyperplasia at 7- 10 ribs and costal cartilage. Because of rib softening, the ribs at the attachment of diaphragm are pulled inward to cause rib eversion.

I don't know if your baby is five months old now. Have you ever taken calcium and cod liver oil? Cod liver oil promotes the absorption of calcium, so you must take preventive dose until you are two years old.

In addition, I suggest you go to the hospital to check the X-ray film. I don't know if your baby touched or fell to see if it was due to trauma.