The answer to 'my sewer line smells bad' is that a foul odor coming from your sewer line is often caused by a blockage or buildup in the pipe. This can happen due to things like tree roots, grease, or debris accumulating over time. Common symptoms include a strong sewage smell, slow draining sinks and toilets, and potential backflow.
To address this, you can try a few DIY solutions first, like using a plunger or a drain snake to clear the clog. However, if the problem persists or the smell is accompanied by other issues, it's best to call in a professional plumber. They have the right tools and expertise to properly diagnose and fix the problem, ensuring your sewer line is operating safely and efficiently again.