Bathroom Sink Clogs Explained: Toothpaste, Hair

Bathroom sink clogs are rarely caused by one single “blocker.” More often, they’re the result of everyday buildup that combines into a stubborn plug inside the drain and pipe bends. As water flow slows, the mixture of hair, soap residue, toothpaste components, and other debris thickens—until it traps even more material.

Understanding what’s forming the clog can help you choose the right fix and avoid making the problem worse with harsher or mismatched methods.