The invention relates to the use of by cyclically-substituted uracil derivatives, on their own or in combination with other active substances, for the treatment and/or prophylaxis of illnesses, in particular for the treatment and/or prophylaxis of inflammatory and fibrotic diseases, for the treatment of endometriosis, of endometriosis-associated fibrosis, of adenomyosis, and of pain associated with an endometriotic disease, and of post-operative peritoneal fibrosis and adhesion formation.