How to Join the American Chronic Pain Association (ACPA) paintom 6 years ago Join the American Chronic Pain Association by going to their website (theacpa.org) and signing up for their newsletter! Share this: Share on X (Opens in new window) X Share on Facebook (Opens in new window) Facebook Share on LinkedIn (Opens in new window) LinkedIn Email a link to a friend (Opens in new window) Email Print (Opens in new window) Print