Laugh lines, also known as nasolabial folds, are the creases that run from the sides of the nose to the corners of the mouth. These lines become more prominent with age due to the natural loss of skin elasticity, collagen, and fat. Factors such as repetitive facial expressions, sun exposure, and genetics also contribute to their formation. While laugh lines are a normal part of aging, various treatments, including dermal fillers, laser therapy, and skin resurfacing, can help reduce their appearance and restore a youthful look. Consulting a dermatologist can provide tailored solutions for managing laugh lines effectively.