A cat that keeps scratching at cat litter and making noises may be a habit, or it may be caused by a problem in the urinary system. Cats can relieve their mood while scratching at cat litter, which is a habitual action of cats. If the cat has difficulty defecating, you can feed the cat some probiotics to help regulate its gastrointestinal tract, and guide the cat to drink more water. If it does not improve, take the cat to the pet hospital for examination and treatment in time.