The answer to 'what causes toilet' is that there are several common causes for toilet problems. Clogs are one of the most frequent issues, often caused by flushing items that shouldn't go down the toilet, like excessive toilet paper, feminine products, or foreign objects. Leaks can also occur around the base of the toilet or in the tank, leading to water damage and high water bills. Over time, the toilet components like the flushing mechanism, gaskets, and seals can wear out and need replacement. Mineral buildup from hard water can also impair the toilet's function.
In many cases, these problems can be fixed with some basic troubleshooting and DIY repairs. But for more complex issues or if you're uncomfortable working on the toilet, it's best to call in a professional plumber to diagnose and resolve the problem correctly.