A foul odor haunts the master bathroom, where a water closet shares a tiled shower stall.

When the smell — something smelly but not sweet — struck a few days ago, I thought, what the hell is that? Then I began trying to figure it out.

I’m really not sure where the smell is coming up. Several ideas hit my brain: broken or backed-up sewer line, broken toilet seal, or shower P trap, with an almost ancillary worry, maybe it’s a dead animal or animal latrine in the crawl space.

The shower isn’t used that often, typically three times a week, typically three to six minutes. I know this because I’m the only one who uses it, so I know when someone steps into the shower instead of the bath.

The smell lacks the ‘sweet decay’ that a dead animal often exudes. It’s more of a crappy smell. I noticed, too, that it seemed to dissipate when I showered. That said, I wasn’t positive that I wasn’t just becoming tolerant with exposure. The smell isn’t growing, either.

There’s no smell outside, and no wet areas or especially green growths, so I don’t think it’s a broken sewer line. The floor around the toilet isn’t soft, wet, or showing stains, and the toilet doesn’t rock when I use it, so I don’t think it’s the toilet wax seal.

Given what I’ve read and experienced, I think it’s that P trap. So now I’ll investigate, try different suggestions, see what results.

It’s not the largest problem I face, or the world has. Just another thing to pull my attention from other things.

Just what 2026 needs.