ForumsLifestyleDiet & holistic hea...Sore/stiffness Caus... Notifications Clear all Sore/stiffness Cause Of Acne?whoartthou 1 MemberMember2(@whoartthou1) Posted : 03/05/2013 2:43 am Could this be the reason why I have body acne (specifically shoulder acne)? Maybe the stifness I get on my shoulders could be constricting blood flow? Quotealternativista MemberMember410(@alternativista) Posted : 03/07/2013 11:34 am more like a common cause - inflammation. Quote