[Alexander]

What causes this and is there anyway to help, I have seen this for a few months now. I thought it was the food at first, changed it same thing.

 

[JoanneF]

That looks to me like it's been broken and not healed properly.

 

[Alexander]

That looks to me like it's been broken and not healed properly.

It's not always like this, only sometimes when he sits. Pretty sure it has a name, but cannot remember it.