More than likely it has started growing back and is now tearing again. It causes it to get very inflamed and can be painful for him as he gets older. My oldest son went thru this. He is now almost six and his still does it from time to time. It cause as they grow in size it starts to tear it back apart. My doctor told me to take vitamen E oil and rub it on his penis in a downward motion pulling the forskin back gently each time. The vitament e oil causes the skin to hacve more elasticity and makes it easier to come back apart with out inflamation. If like some you are uncomfortable touching your son in that way have your husband do it.
at 4:33 PM on Jul. 15, 2008