Why does endometriosis pain come in waves?

Endometriosis pain often comes in waves because the drivers of pain aren’t constant—your body is responding to changing inflammation, hormone signaling, and tissue irritation over the cycle and even day to day. Lesions can behave like “active wounds,” creating bursts of inflammatory chemicals that sensitize nearby nerves, so a trigger that feels manageable one day can feel overwhelming the next. If adhesions or fibrosis are involved, organs may tug or feel “stuck” with certain movements, bowel/bladder filling, sex, or exercise, creating flares that rise and fall rather than steady pain.

Waves can also happen because the nervous system can become more reactive over time (often called central sensitization). When pain pathways are repeatedly activated, the brain and spinal cord may start amplifying signals, so normal sensations can register as pain and flares can spread beyond the original area. This is one reason pain severity doesn’t always match what imaging shows or even what someone has been told about “stage.” If your pain pattern is changing—becoming more constant, spreading, or linking to bowel/bladder symptoms—our team can help you sort out what’s likely lesion-driven, adhesion-related, pelvic floor-related, or nervous-system-driven and build a plan that targets the source, not just the flare.