I leak urine after i use the restroom what can be the reasons for this what can be done ?

Leak after 'PEEING": You need to be more specific - are a man or a woman/how old/previous surgery/"urge" vs no urge.................

Sex dependent: If a male, the urethra is longer and has to hang down (not up an over the underwear) to help drain. A couple of kegles can help the urethra drain completely and help tighten up the sphincter for both xx and xy. For women it could be a sign of a urethral diverticulum.