What happens in aging skin? Kuldeep Minocha, Aesthetic Physician, UK, describes how skin hydration decreases with age due to the decreased amount of natural hyaluronic acid in the skin. Related articles How a well-defined jawline makes you look younger Dr Chris Surek: How do I choose the right treatment for my face? Dr Stephanie Lam: How have aesthetic treatments evolved? Five tips for maintaining your skin quality How to find a doctor you can trust?