Bath Tub Smells Like Rotten Eggs

After you try snaking the bath tub and putting all kinds of cleaners, bleach, drain cleaners. There is usually an easy solution, tell who ever is showering in the bath tub to " stop peeing in the tub". If somebody keeps going pee in the tub it smells like rotten eggs. It could also smell, if there is tile around the tub and water gets behind the tile and it gets the sheet rock wet. It can smell from the wet sheet rock or the wood behind the tile. This is rare but it does happen.