What causes abdominal pain, back pain, and bleeding from the lower body?

Abdominal pain, back pain, and bleeding may be caused by various factors, mainly including: 1. Menstruation: For women, this condition might be a normal menstrual period, usually accompanied by symptoms such as breast tenderness, headache, and irritability. 2. Threatened miscarriage or ectopic pregnancy: If pregnant women experience such symptoms, they might indicate a threatened miscarriage or ectopic pregnancy. Timely examination and appropriate treatment measures are necessary. 3. Gynecological diseases: Gynecological conditions such as pelvic inflammatory disease and endometriosis can also cause these symptoms. Patients need to choose suitable medication or surgical treatment. 4. Reproductive system infectious diseases: In men, these symptoms might be caused by infections of the reproductive system, such as prostatitis or seminal vesiculitis. Prompt medical attention and adherence to medical advice for treatment are required.