The answer to 'my shower smells bad' is that a foul odor in the shower is usually caused by a buildup of mold, mildew, or bacteria in the drain or shower curtain. This can happen over time as soap scum, hair, and other debris accumulate. The smell may also be caused by a clogged drain that is preventing proper drainage and allowing stagnant water to sit.
To address a smelly shower, you'll want to thoroughly clean the drain, shower curtain, and other surfaces to remove any built-up gunk or residue. Using a drain cleaner, vinegar, or baking soda can help break down the blockage and eliminate odors. If the smell persists, you may need to call a professional plumber to inspect the pipes and determine if there is a more serious issue like a damaged or clogged sewer line.