The answer to 'plumbing repair overflowing' is that a clogged drain or pipe is the most common cause of an overflowing sink, tub, or toilet. This can happen due to buildup of hair, soap scum, food particles, or other debris. Symptoms include water backing up and spilling over the fixture.
For minor clogs, you may be able to fix this yourself with a plunger, drain snake, or chemical drain cleaner. However, if the clog is severe or the problem persists, it's best to call a professional plumber. They have the tools and expertise to safely clear the blockage and address any underlying issues.