Hi my son turned 6 in July and is a big lad for his age. At what age should the penis grow through the foreskin. We never want to force it back! ?

Show his doctor . This is an issue that your child’s doctor should have handled with you when your son was an infant. It is very common for the skin to become adherent to the head of the penis. You should have been instructed to regularly retract this skin and clean. This is to keep a build up of material from forming around the head of the penis (smegma) and to prevent adherence. Show the doctor next visit.