A black spot between your teeth is often due to early tooth decay, staining, or food getting stuck there. Keep the area clean by gently brushing twice a day, using dental floss to remove trapped food, and rinsing your mouth after meals so particles do not build up. Try to limit very sugary foods and drinks, as they can worsen the problem, and drink water after eating to help keep the mouth clean. Avoid picking the spot with sharp objects, as this can damage the gums. Notice if the spot grows, becomes painful, or causes bad breath. Consult a dentist to check it early and advise the right treatment before it gets worse.