The participants of this study are working age female patients from the Central Finland Health Care District, and who have been treating because of severe pain. After eligibility has been assessed by health-related questionnaire and clinical examination, the participants will be randomly assigned into the treatment or control group. Treatment group patients will receive the loan activated BEMER-care unit, while controls will receive inactivated sham BEMER-unit. All participants will use the device regularly on a daily bases over three months. After one month treatment break, the treatment group will become a control group and control group will become a treatment group according cross-over design principle. Switching the groups will take place by changing the BEMER devices during the break. Throughout the study, both participants and researchers are unaware whether the participants are using activated or inactivated BEMER-devices. The research will be carried out and coordinated by Central Finland Central Hospital, and the research project will take place between September 2014 and December 2015.