i had a cyst removed from the top of my glans many years ago and it didn't cicatrize properly. so for few months semen got in contact with blood, than it has been fixed by a plastic surgery
maybe with tight foreskin if you force it too much it could crack and be exposed to semen contact.
it would be good I think to elasticize your foreskin progressively using your fingertips, some specific ointment could be helpful but you should talk with your doctor about it