Many people live with pain, tiredness or other physical symptoms that take over their lives, whether or not a medical cause is found. When worry about those symptoms becomes constant and disabling, doctors may diagnose somatic symptom disorder. A new review suggests that most of the questionnaires used to spot the condition capture only part of the picture.
Researchers at Guangxi University of Chinese Medicine searched eight English and Chinese research databases up to October 2025. The findings appear in BMC Psychology. From more than 10,000 records, they identified 34 studies covering 19 screening instruments.
Somatic symptom disorder was introduced in the main American psychiatric manual in 2013, replacing older ideas that focused on symptoms without a medical explanation. Diagnosis now rests on two core parts. The first is having one or more distressing physical symptoms, and the second is excessive thoughts, feelings or behaviours about them, such as persistent worry, high anxiety or spending a great deal of time and energy on health concerns.
The review found that only three of the 19 instruments were designed specifically for somatic symptom disorder. The other 16 were built for related ideas, such as general physical symptom burden or health anxiety, and later borrowed for this purpose.
Ten instruments measured only the physical symptoms and four measured only the psychological response. Just five covered both parts of the diagnosis. Eight instruments had been checked against a clinical diagnosis to see how accurately they identify people with the condition.
Six instruments had been adapted and tested in other languages and cultures, with most of this work focused on a single 12 item scale that measures thoughts, feelings and behaviours about symptoms. Most adaptations concentrated on translation rather than adjusting questions to suit different cultures, even though the way people express distress through the body varies widely around the world.
The findings matter because somatic symptom disorder is common in general practice and hospital clinics and is often missed or misjudged. The review suggests that using a symptom checklist together with a questionnaire on worry and behaviour gives a fuller picture. No questionnaire can make the diagnosis on its own, however, and a clinical assessment is still needed to confirm how long symptoms last and to rule out other explanations.
The review has limits. It was a scoping review, which maps what evidence exists rather than formally rating its quality. It included only studies published in English or Chinese, and some useful tools may have been missed.
Getting the diagnosis right can help patients avoid repeated tests and find treatments that address both body and mind. This review offers clinicians and researchers a guide to which tools measure what, and highlights where better evidence is needed.
