how early do cramps start before period
Cramps (pain in the lower belly area and/or lower back) can start 1-2 days before your period comes and can last 2-4 days. Secondary dysmenorrhea is when cramps and, for some, lower back pain are a result of a medical problem such as endometriosis or pelvic inflammatory disease.enstrual cramps are caused by uterine contractions (when your uterus tightens and relaxes allowing blood to leave your uterus). The lining of your uterus releases special chemicals called âprostaglandins.â These substances can increase the intensity of the contractions, especially if the levels rise.