Quantitative Sensory Testing and Central Sensitization in Endometriosis

Inclusion Criteria: * New or re-referral appointment at the BC Women's Centre for Pelvic Pain and Endometriosis. * Consented to be contacted for future research in the centre data registry (EPPIC NCT02911090; H16-00264). * Surgically confirmed endometriosis, current imaging diagnosis, or current clinically suspected endometriosis diagnosed at the new or re-referral appointment as coded in the registry. * 19 to 49 years old. * Willing and committed to completing six questionnaires about pain. QST specific criteria • Willing and committed to QST testing. Exclusion Criteria: * Currently pregnant or breastfeeding. * Post-menopausal. * Does not speak English - Patients who do not speak English will be excluded to maintain the safety and well-being of the patient, as not understanding the test and process may harm the patient and reduce the validity of the results. We do not have research funding for a translator. Additionally, patients who require a translator are not typically included in the data registry and therefore are unlikely to be in our sample. QST specific criteria * Diabetes or neurological disease predisposing to neuropathic pain. * Previous laparotomy (i.e. large abdominal incision) * Physical trauma (ex., surgery, scaring) to heterotropic QST test site(s) (i.e. deltoid muscle in the shoulder, thenar eminence).