My boyfriend has a bladder mass at the age of 20, he has his medical marijuana card and was asked to stop smoking marijuana by a urologist. I did so much research to see if marijuana effects the bladder and I didn't find nothing indicating that. I did however see how tobacco effects the bladder which in some cases marijuana is used with tobacco. I want to know if it would be bad if my boyfriend smoked marijuana through a joint or pipe having that bladder mass? Or is he able to eat an edible? He is going to have surgery within a week to have it removed.