Adults who are intolerant to gluten may experience digestive upset, such as an occasional case of bloating, constipation and diarrhea, according to Healthline. When the body cannot properly digest gluten, it results in an allergic reaction with symptoms such as headaches, abdominal pain and vomiting.
Celiac disease is a disorder found in patients with an immune reaction to gluten, according to Medical News Today. Symptoms of celiac disease include weight loss, chronic diarrhea, anemia and fatigue; however, some sufferers don't experience any symptoms. Celiac disease is a result of a reaction to gliadin, a gluten protein that's commonly found in barley, wheat, rye and oats. There is no cure for the disease, aside from adopting a gluten-free diet.
Celiac disease affects people regardless of their age, but the disorder often starts in middle infancy, reports Medical News Today. The inner lining of the small intestine becomes inflamed and damaged due to the allergic reaction. This long-term disorder results in the failure to absorb nutrients and minerals, and its effects can change during a patient's lifetime. Other symptoms include flatulence, an increased amount of fat in stools, gastritis, constant hunger and fluid retention.
Subtle symptoms of celiac disease can be seen in other organs aside from the bowel, according to Medical News Today. Mouth sores, nosebleeds, osteoporosis, nerve damage and skin rashes are known to be symptoms of the disease as well.