How can i stop leaking urine when i laugh, cough and sneeze?

Leaking urine: See your urologist to have it checked. Sometimes medicine helps if it is not too bad. It is called stress incontinence.

Physical Therapy: Sometimes medicine can help. Sometimes surgery can help. I always have my patients see a physical therapist that specializes in pelvic floor physical therapy, i see amazing improvements after physical therapy in bladder control. You can find instructions about how to do kegel exercises, but having a physical therapist is much more efficient / effective.