I have a chronic problem in which my body has trouble retaining sodium due to a hormonal issue in my kidneys. I am taking fludrocortisone (a steroid), and I'm also on a fluid restriction of 1400 ml or less each day. The fluid restriction is really tough, especially when it is hot. Not only am I always thirsty, but I am also prone to dehydration. Therefore, I cannot exercise or participate in outdoor activities (biking, swimming, even walking or spending too much time in the sun) during summer. Does anyone have any information about alternative treatments, or anything else that can help me cope?