The answer to 'mouse in my house' is that the presence of a mouse in your home is a common pest problem that can be caused by a variety of factors. Mice are attracted to homes that provide food, water, and shelter, and they can enter through even the smallest of openings. Symptoms of a mouse infestation may include droppings, gnaw marks, and noises, especially at night.
To address a mouse problem, you can try DIY solutions like sealing entry points, removing food sources, and setting humane traps. However, if the infestation is severe or you have difficulty locating the source, it's best to call a professional pest control technician. They have the expertise and equipment to effectively and safely eliminate the mice and prevent future infestations.