For 1yr i have pain in left abdominal.starts day before period&lasts 2-3 wks.had us, no cyst.area hurts2touch&when change from lying2sitting position.

Spastic muscle: At menses a hormone, relaxin, secreted & loosens pelvis ligaments. A large broad muscle, transversus abdominis, goes from right to left pelvic brim. This muscle maintains closure of pelvic girdle joints. Symptoms suggest tendonitis of left transversus; pain aroused by prod & action. If doctor injects Lidocaine & pain dramatically clears this proves. Then cortisone can be injected to resolve.