Sewer gas smell in shower

[Shereeschmalz]

Hi my husband and I bought a new home and when we use the shower a awhile after sometimes it'll smell like sewer gas. I noticed when we used the other shower this morning we went into the other bathroom and again it smelled like sewer gas. Also I notice it in the same shower when I run the washing machine. When it drains it smells like sewer gas in the shower...crazy any advice besides hire a plumber?

[LazyPup]

All drains are equiped with traps that are supposed to hold water to act as a seal to prevent sewer gases from getting into the house. If you are getting sewer gases something is causing the water to be sucked out of the traps. Either the vent is clogged or the vent system is inadquate.

[ABP]

LazyPup is right, but here is one too. I was remodeling an old house one time and the previouse owner had installed a shower without installing a trap. So you may want to see if there is even a trap under there