Two of three patients with multiple chemical sensitivity had less symptoms and secondary hyperalgesia after transcranially applied pulsed electromagnetic fields

•Pulsed electromagnetic fields applied transcranially in 3 cases with multiple chemical sensitivity.•Symptoms and functional impairments improved in 2 of 3 cases.•Capsaicin-induced secondary hyperalgesia was reduced in 2 of 3 cases.•Pulsed electromagnetic fields applied transcranially was a feasible treatment modality in all 3 cases with multiple chemical sensitivity.