Celiac’s disease is a complicated disorder that essentially speaking results in you not being able to properly process carbs in general or gluten.  It is an extremely rare condition, and it can affect you at any age or time in your life.  It has often been misdiagnosed, and with the fact that most doctors use bread in the brat diet for children, obviously that can easily cause symptoms to get far worse.  It results often in diarrhea, weight loss, and anemia, and it may also cause nausea, a larger stomach, bad smelling stool that actually float, muscle cramps, muscle waste, joint pain, bone pain, fatigue, irritability, and depression in general.  Burning on the skin and dermatitis are also extremely common, especially in children.  If left undiagnosed or misdiagnosed, it can obviously cause greater problems if it happens in the future and for extended periods of time, and it can result in serious vitamin deficiencies among other things.  So if you have those symptoms, while it could be something else as well, Celiac’s disease is more common and definitely worth checking out, if only to eliminate it from the race so that you can really move onto other things or otherwise figure it out in various ways for your greater benefit.