There are several reasons for dull and dark complexion. Lack of sleep, stress, and an unbalanced diet can contribute. Excessive sun exposure without proper protection can also darken the skin. Chronic diseases or hormonal imbalances might be factors. To improve it, get enough sleep, manage stress through relaxation techniques. Eat a balanced diet rich in fruits, vegetables, and whole grains. Protect your skin from the sun with sunscreen and wear protective clothing. Regular skincare routines including cleansing, exfoliating, and moisturizing can also help. If the problem persists, consult a dermatologist for further evaluation and treatment options.