Lymphoedema is a progressive swelling under the skin because the lymphatic system has been damaged or can't work properly. This causes enlarged and disfigured limbs, usually one or both legs, but it can also affect arms, breasts and genitals. Lymphoedema caused by lymphatic filariasis (LF) and podoconiosis affects more than 20 million people globally, most of them living in remote and disadvantaged communities in low-and-middle-income countries. 

There is no cure. People affected by lymphoedema must manage their symptoms at home with limited or no health service support. Left untreated chronic oedema progresses relentlessly, leading to lifelong disability and dependence. Progression can be halted and early cases be reversed through active self-care, and with the support of local health workers and the community .