Doctors warn against ill-fitting menstrual cups – CTV
March 11, 2025
Doctors are warning ill-fitting menstrual cups could potentially lead to health concerns after the case of one woman who developed a rare case of temporary kidney problems.
Danish doctors quoted in the British Medical Journal advised there could be a rare, but serious consequence to using a menstrual cup. which is used to catch monthly blood flow, which isn’t correctly positioned or is of the wrong size.
In the case report, urologists Clara Maarup Prip and Lotte Kaasgaard Jakobsen from Aarhus University, state that menstrual cups are designed to fit at the edges of the vaginal wall, but if inserted incorrectly, they can compress the ureter, which could lead to a condition called “ureterohydronephrosis.”
In their report, a patient in her early 30s suffered from blood in her urine and pain in both her abdomen and her side for six months before her scans showed swelling in her kidney and ureter (the tube that carries urine to the bladder).
Imaging revealed a menstrual cup compressing the uterer’s opening at the juncture.
