Thank you for your query.
I am afraid the skin will not open any further beyond the age of 3 years.
If there is ballooning of the skin during urination or he has suffered from UTI in the past then he should have a circumcision
at the earliest.
I think you should consult a pediatric surgeon for a second opinion
before waiting any further.It is a minor operation requiring day care surgery.
If you have any further queries you are free to consult me.
Hope this answers your query.
Wishing a speedy recovery.
Have a nice day.