The answer to 'mouse scratching sounds' is that they are likely caused by mice or other rodents that have taken up residence in your home. Mice can make a variety of noises, including scratching, scurrying, and squeaking, as they search for food, nest, and move around your home.
Some common signs of a mouse problem include hearing scratching or scurrying noises, especially at night, seeing droppings, or noticing damage to food packaging or other household items. Mice can also spread diseases and contaminate food, so it's important to address the issue quickly.