Dark lips are a common problem that can be caused by a variety of factors, including sun exposure, smoking, and certain medical conditions. While there is no one-size-fits-all solution to avoiding dark lips, there are a number of things you can do to help prevent and treat them.
One of the most important things you can do to avoid dark lips is to protect them from the sun. Sun exposure can damage the skin on your lips, leading to dryness, wrinkles, and darkening. To protect your lips from the sun, be sure to apply a lip balm with SPF 15 or higher every day. You should also wear a hat and sunglasses when you are outdoors.