The answer to 'why is my mouse scratching sounds' is that mice often make scratching sounds as they try to find food, build nests, or chew on materials in your home. These noises are common signs of a mouse infestation. Mice have constantly growing teeth, so they need to chew on things to keep their teeth worn down. They may scratch and gnaw on walls, floors, furniture, or other surfaces as they search for food and shelter.
If you hear frequent scratching, scurrying, or squeaking sounds, especially at night, it's likely that you have mice in your home. Other signs of a mouse problem include droppings, damaged food packages, and small holes or entry points. Mice can spread diseases and contaminate food, so it's important to address an infestation quickly.