Salt. One of the main causes of water retention is eating too much salty food. The main component of salt is sodium, which the body dilutes with water if too much of it is present. Salt makes you thirsty, and your body will hold on to this water.
Or reject it, or counter-offer your terms. Usually you should hear back from the seller within 2 days, unless the seller is a bank (foreclosure) in which case they can take up to 10 days to get you a response.
The typical home sold was on the market for 5 weeks. You may not have long to decide whether to accept the offer or to make a counteroffer. Most contracts give the home seller 48 hours or less in which to respond to the buyer. You don't have to accept the offer, especially if it differs from what you asked for in your listing agreement.