Sciatic pain that worsens during your period may not be a back issue. Catamenial sciatica is a rare form of endometriosis that affects the sciatic nerve, causing burning or electric pain down the leg that follows the menstrual cycle. Often misdiagnosed, this condition highlights how endometriosis can impact the nervous system far beyond the pelvis.

The menstrual cycle is more than a period — it’s a monthly rhythm guided by hormones that affect energy, mood, pain, and inflammation. This guide explains the four cycle phases and key hormones like estrogen, progesterone, FSH, and LH to help better understand your body.