Does endometriosis get in your blood stream?

Usually not: Blood borne spread of endometriosis is not common. Endometriosis can be found in places for which there is not a good explanation on how it got there. For example, very rarely it can be found in the central nervous system.

No: Endometriosis - cells of the type that should be inside the uterine lining that grow in other places - essentially never gets into the blood stream itself. However endometriosis can cause inflammation, pain, and stress. Those issues can alter certain things in your blood and cause related symptoms generally. Treatment of endometriosis may help those symptoms also.

Maybe: One of the many theories of how endometriosis develops suggests that in rare cases, the cells can be transported in the blood and "implant" in distant tissues of the body.

Very rarely: Endometriosis can be diagnosed when the normal endometrial lining tissue is found outside of the uterus. The vast majority of the time it occurs as implants, scarring, and cysts in the bottom of the pelvis, this probably results from menstrual blood flowing backwards out of the tubes. Very rarely it can be found in distant sites such as the lungs, presumably carried there by the bloodstream.