something like gatoraide. >> the best treatment is to restrict your fluid. that's the treatment first. >> how much water, doctor? we have to go they're saying. how much water a day? >> not so much how much water. slow down the water intake to bring the salt up. if you replace the salt rapidly, what you can do is you can cause edema in the brain and you can actually kill somebody. so you have to do it very gently and if you cannot restrict fluid you can get a very slow amount of salt gradually and this has to be done in the icu under control. >> if it's a severe case. you do it with fluid. >> if i may jump in, because i think this is exciting and we are going to hold this topic over to the next break. stick around and have more on this. if you have questions, tweet us. r and i feel great because i used the truecar app. truecar knows what other people paid for this car, so i know if i'm getting a fair price. this is how car buying was always meant to be. this is truecar. (cheerful music) seaworld we'd like you to know. we don't collect killer whales from the w