FSS in adults can be managed effectively be means of psychological treatment, but the evidence for adolescents with severe FSS is sparse. Family based cognitive behavioural therapy (CBT) and internet-delivered CBT has proven effective for young patients with particular symptom profiles. However, the development of various specific treatments for each FSS or symptom profile is not an efficient strategy. Recent studies suggest that adult patients with various FSS sampled by the BDS diagnosis can feasibly be treated together, regardless of their main somatic complaint. The same may be true for adolescents, and hence the development of a common treatment for adolescents with various FSS or BDS may be advantageous, and facilitate further implementation in routine clinical care if the treatment is found effective.