The answer to 'bathtub making noise' is that a bathtub making noise is usually caused by loose or worn-out parts, such as a dripping faucet, a loose drain, or a malfunctioning stopper. The most common symptoms are a squeaking, creaking, or knocking sound when the tub is in use.
The solutions can range from a simple tightening or replacement of the affected parts to more complex repairs like reseating the tub or replacing the entire drain assembly. If the noise is coming from the tub itself, it may be a sign of a more serious issue, such as a cracked or damaged tub that requires professional replacement.