While there is as yet no research in the area, there has been excellent feedback worldwide on the positive effects of EMDR with a number of somatic complaints. Sometimes the physical problem appears to be simply earlier memories stored somatically. Sometimes, there are experiential contributors that cause on-going stress. Sometimes alleviating the effects of earlier events can have a very positive effect on longstanding physical problems. However, each client is different. It is important that your relatives find a trained and experienced EMDR therapist who is comfortable treating their problems. You can get referrals from the EMDR Institute, and then should interview those on the list to find the best fit. Sometimes EMDR is best used to find a comfortable way of living with disability. You might want to read the chapter in my 1997 book EMDR devoted to this subject.