It is estimated that every tenth woman of childbearing age has endometriosis. That's around 1.7 million sufferers in Germany. There are around 40,000 new diagnoses every year (Diedrich et al. 2006). The most important leading symptom is severe pain during menstruation, but also abdominal pain independent of the period. The more severe the pain, the greater the reduction in quality of life (Facchin et al. 2015). Depending on the localisation of endometriosis lesions, other symptoms, functional complaints and accompanying symptoms may also occur. Endometriosis is a chronic pain disorder that often takes several years to be diagnosed. In addition, current therapies result in high recurrence rates and the cause of the disease remains unclear (Diedrich et al. 2006; AWMF 2020). The long-lasting pain leads to complex neurological changes that often cause the pain to become chronic (Ball and Khan 2020; Brawn et al. 2014). Pain is defined as chronic if it lasts for more than three months or is recurrent (Treede et al. 2019).