Clogged drains and blocked toilet may begin as a minor problem but can instantly turn into a major problem. A clogged drain can cause slow water drainage, erosion, flooding, and, in severe cases, sewage backup and costly repairs. Preventing them begins by identifying the causes of clogged drains. Water stagnation — stagnant water in clogged pipes serves as a breeding ground for hazardous bacteria and is the leading cause of waterborne illness and blocked toilet. Smells — bad odors degrade your quality of life, contaminate the environment, and can cause headaches, irritation, tension, anxiety, and poor sleep over time. If there's an interior blockage or blocked toilet, it might have happened as a result of flushing heavy materials or things down the drain. Sanitary goods, paper towels, and other difficult-to-flush debris can clog pipes and choke drains, resulting in overflowing drains. Wipes, tissues, and even hair can be the source of contamination.