Sagging skin of the upper legs is often a sign of aging. Moreover, the lack of firmness in your legs may encourage bone density loss and reduced muscle mass. The most common cause of sagging skin is aging. However, rapid weight loss can also contribute to sagging skin. One of the best preventatives of sagging or loose skin is exercise.

Age spots on the legs are incredibly common and normal. They are especially common in people 40 years old and older. Areas of the body that are exposed to the sun, like the hands, face, arms, and legs, can develop aging spots. Exposure to sunlight causes melanocytes (pigment-producing cells in the skin) to multiply.