text: why do i wet my pants when i laugh?   you have stress incontinence--it happens when you laugh, sneeze or cough.  especially  if you are female, have had a few kids, are over 50.  see a doctor--she/he can prescribe a medication (there are a few available).  wear a thin pad & empty your bladder often.  better yet, try kegel exercises--they are good for your bladder and for your sex life! and don't stop laughing!