Iuliia Burmistrova/Getty Did you know your body has an inbuilt sewerage system? It’s called the lymphatic system, and is a crucial part of how your body fights infection and disease. Lately the lymphatic system is causing a stir online, with some social media personalities promoting “lymphatic drainage” for beauty and skin health. So what is lymphatic drainage? And is it backed by science? What does the lymphatic system do? The lymphatic system is a network of tiny vessels that, like your blo