Hello I am a mother of a 13 year old son I should let him crop
Just like that: No ...
For foreskin constriction: Also no ... There are many alternatives to circumcision
Without medical reasons In no case and even in a phimosis is often no circumcision necessary.
You can not do that, without that he wants that if there is no medical indication. You will not find a doctor who forces a 13-year-old.
If it is medically meaningful, then - with the approval of the doctor - yes, otherwise: No!
If you ask, no.
Sowas should not answer a forum on the Internet, but within the family and under consultation with the attending physicianbe ardes.