Hanna is right. However I do have strong opinions.
As Hanna said, exercise is vital. We need to move lymph fluid through the body, and we have as much lymph fluid as we do blood. Lymph fluid is our sewer fluid and our lymph veigns are our sewer pipes. This yucky fluid cannot be moved through our sewer pipes without exercise, where each sewer pipe has multiple one way valves. Even walking for 1/2 hour a day can work wonders.