• Haruka Amitani, Ryusei Nishi, Takamasa Fukumoto, Kazumasa Hamada, Ryuichi Kato, Takako Yamamoto, Yuuki Fuku, Kenichiro Sagiyama, and Akihiro Asakawa.
• Department of Psychosomatic Internal Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, Sakuragaoka, Kagoshima, Japan.
• Medicine (Baltimore). 2024 Apr 19; 103 (16): e37929e37929.

RationaleFibromyalgia (FM) is characterized by idiopathic persistent chronic pain in the ligaments or musculoskeletal system, and more than half of the patients with FM might have migraine headaches. Direct musculoskeletal intervention could be a non-pharmacological management to relieve symptoms. However, patients with severe FM often have intense pain from only a soft touch, thereby rendering musculoskeletal intervention challenging.Patient ConcernsA 47-year-old man had progressing intense pain, and this affected his everyday life. There were no abnormal physical findings on laboratory examination such as levels of complement, antinuclear antibodies, and C-reactive protein, which were within normal limits. Magnetic resonance imaging did not indicate abnormalities.Diagnoses, Interventions, And OutcomesThe patient satisfied the American College of Rheumatology criteria. Finally, we made a final diagnosis of fibromyalgia. The therapeutic intervention of Kanshoho, the unique muscle relaxation technique with low force, relieved his pain.LessonsIf Kanshoho is carefully applied in a state of hospitalization under surveillance by an experienced physician, it could be a promising muscle relaxation method. Relaxing the trapezius muscle and reducing its intramuscular pressure might be key in treating patients with severe FM. However, it needs elucidation of its mechanism.Copyright © 2024 the Author(s). Published by Wolters Kluwer Health, Inc.

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