If you walk into your bathroom I smell sewer gase don’t panic. No solution to fix this problem is really easy. So many people call the plumber just find out that the water evaporated out of the Ptrap and is now allowing sewer gase to come into the bathroom. The solution is simple turn on the water. When the Ptrap fills up with water this will stop the sewer gases from coming out of the bathroom. Now it’s just a matter of renting out the sewer gas that was in there before he fixed the problem.