Conversation: The conversation between human and AI assistant.
[|Human|] My sister has swollen legs she drinks alot of water and is still dehydrated cannot atke diuretics. Her legs are so swollen she cannot walk on them some days. She has been checked for heart disease and that has been ruled out and so has Lupus, she need s some snswers. and yes she is overweight but cannot excerise, because the swelling is so bad. any advice would be appreciated
[|AI|]  Hi ! I appreciate your query of health concern. Heart disease is not only a cause of legs swelling. There are so many causes.  After venous insufficiency, obesity is the next most common cause of lower extremity swelling. Abdominal obesity partially obstructs venous outflow and lymphatic outflow from the legs. Obesity also accelerates the stretching of the leg veins due to the effects of gravity, thus contributing to the progression of venous insufficiency. Diabetes Insipid us also causes excessive Thirst and swelling over body. Other causes of swelling are Hypothyroidism, Chat Doctor.  Hope this will help you.