The full answer
A few common explanations
Persistent symptoms after going gluten-free are often due to ongoing hidden gluten exposure (frequently from cross-contact or unrecognized ingredients), the intestine still being in the process of healing, or another overlapping condition like lactose intolerance that developed alongside celiac disease.
When to bring this to a doctor
If symptoms don’t meaningfully improve after several months on a strict gluten-free diet, it’s worth revisiting with a doctor or dietitian — sometimes reviewing the diet in detail uncovers a hidden gluten source that wasn’t obvious. See also why fatigue specifically can linger.
Important context
Individual symptoms, reactions, medical histories, food products, and local labeling rules can vary. Community experiences are not medical evidence.
For personal medical decisions, diagnosis, testing, or treatment, consult a qualified healthcare professional.