what causes lower back pain and cramping
Pelvic Inflammatory Disease. Pelvic inflammatory disease can cause lower back pain and lower abdominal pain. FamilyDoctor.org states that pelvic inflammatory disease is an infection of any of the female reproductive organs, including the uterus, fallopian tubes or ovaries.
Abdominal Aortic Aneurysm. An abdominal aortic aneurysm can cause lower back pain and lower abdominal pain. According to MayoClinic.com, an abdominal aortic aneurysm is a weakened and bulging area in the abdominal aorta--the largest artery in the body.