What are the symptoms of having celiac sprue? Especially wondering about mild cases.

A variety. There can be a variety of GI and non-gi symptoms which can make the diagnosis difficult to make. Non-specific abdominal pain, diarrhea, constipation, bloating, gas, enamel problems with teeth, liver problems, thyroid and other endocrine problems like type i diabetes. Blood work and genetic tesing can help make the diagnosis.