The signs and symptoms of celiac disease can vary greatly and differ in children and adults. Digestive signs and symptoms for adults include: 
Diarrhea
Fatigue
Weight loss
Bloating and gas
Abdominal pain
Nausea and vomiting
Constipation
 However, more than half the adults with celiac disease have signs and symptoms unrelated to the digestive system, including: 
Anemia, usually from iron deficiency
Loss of bone density (osteoporosis) or softening of bone (osteomalacia)
Itchy, blistery skin rash (dermatitis herpetiformis)
Mouth ulcers
Headaches and fatigue
Nervous system injury, including numbness and tingling in the feet and hands, possible problems with balance, and cognitive impairment
Joint pain
Reduced functioning of the spleen (hyposplenism)
 Children Children with celiac disease are more likely than adults to have digestive problems, including: 
Nausea and vomiting
Chronic diarrhea
Swollen belly
Constipation
Gas
Pale, foul-smelling stools
 The inability to absorb nutrients might result in: 
Failure to thrive for infants
Damage to tooth enamel
Weight loss
Anemia
Irritability
Short stature
Delayed puberty
Neurological symptoms, including attention-deficit/hyperactivity disorder (ADHD), learning disabilities, headaches, lack of muscle coordination and seizures
 Dermatitis herpetiformis Gluten intolerance can cause this itchy, blistering skin disease. The rash usually occurs on the elbows, knees, torso, scalp and buttocks. This condition is often associated with changes to the lining of the small intestine identical to those of celiac disease, but the skin condition might not cause digestive symptoms. Doctors treat dermatitis herpetiformis with a gluten-free diet or medication, or both, to control the rash.