Here are some notes on 7 possible causes of cramps without menstruation:
Ovulation: Midway through your menstrual cycle, ovulation is a common time for cramping. It results from an egg being released from the ovary.
Implantation: Around the time of your expected period, a fertilized egg may embed itself into the uterine lining, which may result in cramping.
Stress: Stress, whether it be physical or emotional, can cause cramping and tense muscles all over the body, including the abdomen.
Digestive Problems: Similar to menstrual cramps, stomach cramps can be brought on by conditions such as irritable bowel syndrome (IBS), constipation, or gas.
Pelvic Inflammatory Disease (PID): Pelvic pain and cramping can result from an infection of the reproductive organs, typically brought on by sexually transmitted diseases (STIs).
Endometriosis: This disorder is characterized by tissue that resembles the lining of the uterus growing outside of it. Symptoms include cramping and pain in the pelvis.
Ovarian cysts: If the fluid-filled sacs on the ovaries burst or twist, they may cause pelvic pain and cramps.