- Dehydration
 - "Weekend Warrior" syndrome.
 
Just remember to drink half your weight in ounces of water every day. It is really easy if you just follow these 4 steps:
- Drink a big glass 1st thing in the morning- at least 12 ounces.
 - Drink a big glass 10 minutes before each meal- at least 12 ounces each time.
 - Drink just 2 bottles of water throughout the day besides the "before-meal" glasses.
 - Be sure to keep up your electrolytes by using RealSalt. Pedialyte or gatorade may be used if necessary but they have lots of sugar in them making them less healthy.