DS pees every 5 minutes.... how to tell him to empty his bladder properly?

[tostaky]

He is 21 months. Im not at the stage where i let him go without nappy.
He is ok-ish with poo.
ut every time he is bared-bottom or he wears slips, he pees every 5 minutes...

When i tell him to do a bigger pee in the potty, he really strains and then he says "all gone"...
not too sure how to go about it...
any advice?

thank you!

i may be wrong, but i am sure i read somewhere that this showed that a boy is not ready....due to the muscle at the bladder not being developed enough to hold in urine, hence the constant dribbles/small amounts, rather than a few long pees.
Maybe try again in a month or two....don't give him a hard time...he may not physically be ready yet.
My son (3) is the same....does poos usually without issue.....struggling with the pees.
He was late with his other physical development milestones, the health visitor said to me not to push toilet training too early...perhaps she was thinking this muscle may take longer to develop in my son.