We just bought a trailer about a year ago and now that's its getting nice out we get this really bad smell from our master bathroom espically when it gets hot. We have two sperate sinks and a shower witch we use all 3 all the time we also have a big tub in the corner of the bathroom that we only use about 2 times a month if that. When we open the cubords doors under the sinks the smell gets really bad but like I said before when it gets hot out the smell gets really bad we also have carpet it the whole bathroom including around the toilet sometimes when I'm going to the bathroom I do miss but not that much that it would make the bathroom smell like that can someone please help I really don't want to call a plumber if we don't have to. Also we live in the city so we do not have our own septic system we are with city water and sewer can someone please help thanks?******UPDATE******I FOULD OUT THAT IT IS A MOTHER COOK AND AT LEAST 2 Baby's DOES ANYONE KNOW HOW TO GET RID OF COONS THAT ARE UNDER MY TRAILER BUT IN THE UNDERBELLY OF IT PLEASE HELP

Is this trailer tied to your city sewer via a drain line or is there a holding tank? Whichever you have it sounds like there is no trap.

We are tied in with the city someone else said it might be that we have a dead mouse or rat under the insulation it does smell bad when I take the side cover off the side of the bathtub but I can't really see if there is anything in there.

A mouse would quit smelling in about a week and a rat two weeks. If it smells like sewer gas then its not a mouse. Is it sewer gas or just a moldy smell.