The full answer
Yes — first-degree relatives are at meaningfully higher risk
Because celiac disease runs in families, first-degree relatives (parents, children, siblings) of someone diagnosed have a significantly higher chance of also having it — including silent, symptom-free cases that would otherwise go unnoticed.
What testing typically looks like
Doctors often recommend blood testing for close relatives even without symptoms, and may suggest periodic retesting afterward since celiac disease can develop later even if an earlier test was negative.
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.