Another simple tipis to avoid carrying bags by the handles, which impairs circulation to the fingers. There is little objective evidence to suggest that any nutritional supplement benefits patients with the condition. Minimising stress through general relaxa- tion techniques may be ofbenefit. Biofeedback has been a popular treatment, but a recent Cochrane review found it to be no more effective than sham biofeedback." Sup- port groups can provide helpful tips and guidance on self management. A prospective study showed that smoking.