Gall poen parhaus effeithio ar unrhyw un o unrhyw oed, ar unrhyw adeg a dyma un o’r symptomau mwyaf cyffredin sydd gan bobl sy’n cael eu gweld mewn lleoliadau gofal sylfaenol a gofal eilaidd. Amcangyfrifir bod rhwng 33% a 50% o boblogaeth oedolion y Deyrnas Unedig yn byw gyda rhyw fath o boen parhaus, sef cymaint ag 1.3 miliwn o bobl yng Nghymru. Gall y cyflyrau hyn gael effaith ddifrifol ar iechyd meddwl, gallu i weithio a pherthnasoedd gyda ffrindiau a theulu.
Persistent pain can affect anyone of any age, at any time and is one of the most common presenting symptoms in primary and secondary healthcare. It is estimated between 33% and 50% of the adult population in the UK live with some form of persistent pain, which equates to as many as 1.3 million people in Wales. These conditions which can have a serious effect on mental health, ability to work and relationships with friends and family.