If the pain radiates from your joints, usually for me it would be hip, knee, ankle .. Chances are you got some syatic activity. A few visits to a chiropractor should straight'n it out. From what I understand, a nerve gets caught in or near your hip socket which is where the pain starts. Sometimes if you stretch out your hip you can free it up and get some relief, but it will probably just be temporary until you have it checked out.
I'm 6'3" and when I was a kid I remember having tons of "growing pains".
If it would happen to be syatic, it's probably not directly related to crohns.