The symptoms of this disease are many and varied, and change depending on the age of the patient, it is not the same as a child who is a teenager. In children often lead to vomiting, diarrhea or severe constipation, abdominal distension (swollen belly as the malnourished children that we see in the ads from the ngos asking for help for african countries), depression, the beginning of autism, anemia,... In general, a child with celiac that is undiagnosed and it is thin (very thin), with the belly swollen (a lot), which almost always is tired and vomit very frequently after eating (at least the way I was and I see that is what describes the specialists). In teenagers is different, they usually stop the vomiting, appears dermatitis or areas of the skin with a pigmentation clearer, the anemia, and to me particularly gave me voltage drops very frequently, even to faint. For no apparent reason. I always had very low stress, always with treatments for anemia that never healed, and that I ate a lot!, and always very thin. There are people who also caused fibromyalgia, bone problems, (in my case the problems appeared in my teeth, I broke the teeth with a lot of ease, in addition to being very worn out for my age).