An ectopic pregnancy can cause lower back pain and lower abdominal pain. An ectopic pregnancy occurs when a fertilized egg becomes implanted in a location outside the uterus. In over 95 percent of cases, ectopic pregnancies occur in the fallopian tubes--the tubes that connect the uterus with the ovaries, according to KidsHealth, an information website sponsored by the Nemours Foundation. Other possible implantation locations outside the uterus include the ovary, abdomen and cervix. Pregnancies in areas outside the uterus cannot progress, as these areas lack the necessary space and nurturing tissue to ensure the development of the fetus. Ectopic pregnancies can cause severe bleeding, and they can lead to life-threatening complications. Common signs and symptoms associated with ectopic pregnancy include abdominal and pelvis pain, vaginal bleeding, dizziness and lightheadedness.
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. If the cervix comes into contact with a sexually transmitted infection, such as gonorrhea or chlamydia, it can become infected. The infectious bacterial agent may then migrate up the reproductive tract, causing pain and inflammation in the structures it infects. Over time, the fallopian tubes can sustain enough damage to impair the fertilization process. Common signs and symptoms associated with pelvic inflammatory disease include lower back pain and abdominal pain, abdominal tenderness, yellow-green vaginal discharge, irregular menstrual periods, chills, nausea, diarrhea, vomiting, pain during urination and pain during sex.
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. A rupture of the abdominal aorta is a life-threatening condition, as it can cause significant internal bleeding. Most people with an abdominal aortic aneurysm do not experience symptoms, unless the aneurysm ruptures. Possible signs and symptoms of an abdominal aortic aneurysm include a pulsating sensation near the navel or belly button, pain in the lower back and abdomen and abdominal tenderness. Certain risk factors increase the likelihood of an abdominal aortic aneurysm, including being over 60 years old, long-term tobacco use, chronically elevated blood pressure or hypertension, hardening of the arteries and being male. A person with a family history of aortic aneurysm is also more susceptible to this condition.