Is Flex Disc safe to use? The Flex Company December 18, 2020 00:14 Updated Follow Absolutely! Here's a word from out go-to medical advisor Dr. Jane van Dis. She's a board-certified OB/GYN with 13+ years of experience. Have more questions? Please contact us here! Related articles Will a menstrual disc cause my period blood to get pushed back up into my uterus? My partner and I can feel Flex Disc during sex. How do I insert and remove Flex Disc? Can I exercise while wearing Flex Disc? Tilted Cervix & Flex Comments 0 comments Article is closed for comments.