The answer to 'why is my drain trap overflowing' is that the drain trap is likely clogged or blocked, preventing proper drainage. This can happen due to accumulated debris, hair, grease, or other materials building up over time in the trap or the connected pipes.
Some common symptoms of an overflowing drain trap include water backing up in the sink or tub, foul odors coming from the drain, and slow or sluggish drainage. If the trap is overflowing, it's important to address the issue promptly to prevent water damage and potential health hazards.