The answer to 'my toilet repair smells bad' is that a bad odor coming from your toilet can have several common causes, including a clogged or leaking toilet, a problem with the wax ring seal, or bacteria buildup in the tank or bowl. Symptoms may include a strong sewer-like smell, gurgling noises, or water backing up.
To address the issue, you can start by checking for any visible clogs or leaks and addressing those first. If the problem persists, you may need to replace the wax ring seal or clean the tank and bowl thoroughly. However, if the odor is severe or you're unable to identify the root cause, it's best to call a professional plumber to diagnose and fix the problem properly.