Inclusion Criteria:

• Clinical condition characterized by somatic symptoms such as recurrent abdominal pain, recurrent vomiting, dyspepsia, psychogenic cough, and chronic functional pain (headache, migraine, musculoskeletal pain) for which an organic cause has been excluded and whose symptom has had a strong impact on the quality of life (presence of the symptom for six months, school absenteeism, social isolation, immobility, psychological distress, difficulty in participating in sports and extracurricular activities, etc.), as per Diagnostic and Statistical Manual of Mental Disorders (DSM-5) criteria.
• Age between 11 and 17 years
• Italian speaking
• Patients' and parents' consent

Exclusion Criteria:

• Cognitive and/or developmental impairment
• Difficulty in understanding the Italian language
• Presence of organic disease diagnosis
• Lack of informed consent
• Patient who does not meet DSM-5 criteria for somatic symptom disorder

Caregiver exclusion criteria:

• Cognitive deficits
• Difficulty in understanding the Italian language
• Lack of informed consent

Control group population inclusion criteria:

• Age between 11 and 17 years
• Adequate knowledge of the Italian language
• Consent to participate