Go through these in order and stop at the first one that applies. If you are reading this for someone else, answer for them.
Persistently elevated levels may suggest ongoing exposure and should prompt a careful review rather than blame.
More urgent assessment is appropriate for severe weakness, significant dehydration, repeated vomiting, fainting, severe abdominal pain, or gastrointestinal bleeding.
Follow-up helps confirm that symptoms are improving, nutritional problems are being corrected, and gluten exposure is being minimized.
An early visit is often used to review the diet, laboratory results, and access to a knowledgeable dietitian.
Further visits are based on symptoms, test results, age, and recovery.
The article also says
Celiac antibody levels are commonly repeated over time.
Falling levels support reduced gluten exposure, but a normal result does not prove that the intestine has fully healed.
Blood counts, iron, vitamins, liver tests, or bone health may be monitored when they were abnormal at diagnosis.
Some adults may need a repeat endoscopy and biopsy, especially if symptoms or laboratory abnormalities continue.
Children are often followed for growth, development, and nutritional status.
Close relatives should ask their own clinicians whether screening is appropriate.
They should not begin a gluten-free diet only because one family member has been diagnosed.
Contact the care team routinely if symptoms do not improve, return after improving, or make it difficult to eat a balanced diet.
Every sign above is quoted from the sofidex article on Celiac disease. If you are not sure, err upward — it is always reasonable to be checked.