Keep it dry, keep it clean.
And change your pad more often even if it's not full. (maybe use two smaller ones)
I could probably get through a whole 24 hours with one pad if all that mattered was it being able to absorb all the pee. However that would make it a perfect warm moist place to let bugs grow. So I change my pads to keep things fresh,
just like women have to do when on their periods.
May be worth checking with doc in case you have got "jock itch" or similar, if so plenty of simple creams to make it go away again.
Alf