Dry it with kitchen towel paper first by pressing down hard. Then some baby wet wipes, press it down firm on the urine spot... then press it down hard to remove the wetness with a kitchen paper towel or dry cloth/towel. Can do it once/twice then let it air dry completely, usually in air con room it dry very fast, just dont lie down on that spot, if really need lie down can use baby rubber mat put over and just slp on it. If not sleeping, remove mattress cover also, it dries better.
If you're currently pregnant, I think it's quite normal. sometimes baby presses on the bladder. Just one cough or sneeze gets me to pee myself zz Try fabric softener and let it sit for 5 mins then clean it away to get rid of the smell.
It did not happened to me before but maybe you can monitor first. If only happen once then it’s fine. If it keeps occurring, maybe you should consult a doctor.
if u arent currently pregnant, consider getting it checked out by the doctor?