One way in which healthcare providers communicate reassurance is by informing patients when their symptoms are normal, either for a particular life stage (for example, menopause) or health context (for example, postprocedural pain). Although reassurance aims to reduce anxiety and bolster self-efficacy, which are factors that generally facilitate action, our results suggest that normalization can paradoxically have the opposite effect, reducing people’s inclination to pursue treatment. A total of 14 studies (n = 9,371) document this phenomenon, including when and why it occurs. Here we find that normalization triggers a reappraisal of treatment norms, where people infer that their healthcare provider is normalizing their symptoms to communicate that treatment is not warranted. As this is typically not providers’ intention, we also identify communication strategies to overcome this faulty inference. While these experiments demonstrate a consistent effect across many samples, they...