Back pain often makes people think of a strained muscle, slipped disc, or other spine problem. But pain can also be felt in the back when its source is an organ or another part of the body.
Finding the cause matters because the right next step depends on it. Pain location and other symptoms can offer clues, but they can’t confirm a diagnosis on their own.
The World Health Organization estimated that 619 million people had low back pain in 2020, with projections reaching 843 million by 2050. Those figures cover low back pain overall, not the number of cases caused by problems outside the spine.
Back pain causes can include referred pain from organs
Referred pain is pain felt in a different place from where it starts. Nerves can carry signals from internal organs in ways that make a problem feel like back or side pain. That means location alone doesn’t tell you what’s causing the discomfort.
Kidney and urinary problems can cause flank or back pain
Kidney stones and kidney infections can cause pain in the side or back, often near the lower ribs. Other symptoms may include painful or frequent urination, blood in the urine, fever, chills, nausea, or vomiting. Get prompt medical care for severe pain or pain with signs of infection.
Digestive conditions may be felt in the back
Pancreatitis and some gallbladder problems can cause pain that spreads from the abdomen into the back. Abdominal pain, nausea, or vomiting may occur, and some people notice pain related to eating. These clues can help a clinician assess the cause, but they don’t confirm a digestive condition.
Pelvic and reproductive conditions can radiate to the back
Endometriosis and some pregnancy-related problems can cause pelvic pain that reaches the lower back. Menstrual changes, unusual bleeding, and pregnancy status may help guide an assessment. If you’re pregnant and have pain with bleeding, dizziness, or fainting, seek urgent medical care.
Back pain causes outside the spine can need urgent attention
In rare cases, back pain is linked to a serious health problem outside the spine. The overall picture matters: how fast the pain began, how severe it is, and whether other symptoms are present. Certain warning signs call for urgent or emergency care.
Aortic problems can cause sudden, severe back pain
An abdominal aortic aneurysm is a rare but serious cause of back or abdominal pain. Risk can be higher with factors such as smoking, high blood pressure, older age, or a family history of the condition. Sudden, intense pain with fainting or collapse needs emergency care; back pain alone doesn’t mean you have an aneurysm.
Infection or cancer can sometimes cause persistent pain
Infections and cancer are uncommon causes of back pain, but a clinician may consider them when other concerning signs appear. These can include fever, unexplained weight loss, a history of cancer, or feeling generally unwell. Don’t try to diagnose the cause from these signs; arrange a clinical assessment.
Know when back pain is an emergency
Get emergency help for new loss of bladder or bowel control, numbness around the groin or inner thighs, or worsening leg weakness. These symptoms can point to serious nerve problems that need quick care. Major trauma, or sudden severe back or abdominal pain with fainting or collapse, also requires emergency attention.
Pain may come from nearby muscles, joints, or nerves
Some pain starts in structures near the spine rather than in an internal organ. Hip problems, soft-tissue strain, and irritated nerves can all affect the back or areas around it. More than one cause can overlap, so a physical exam may be needed.
Hip problems can be mistaken for back pain
Hip conditions may cause pain in the buttock, groin, thigh, or lower back. Stiffness or trouble walking can also occur, especially when certain movements make the pain worse. Tell a clinician which movements affect your symptoms and where you feel the pain.
Muscle and connective-tissue problems can spread pain
A strain or irritation in muscles and other soft tissues around the back, pelvis, or abdomen may cause pain across a wider area. It may change with movement or pressure. That pattern can offer a clue, but it doesn’t prove which tissue is involved.
Nerve pain can travel beyond the back
An irritated nerve may cause pain, tingling, numbness, or weakness that travels into an arm or leg. New or worsening weakness needs prompt medical assessment. Seek urgent help if it comes with changes in bladder or bowel control.
How clinicians assess unexplained back pain causes
A few details about your symptoms can help a clinician decide what to check. Keep track of changes, share relevant health information, and be ready to describe how the pain affects daily life. Online symptom lists can’t replace an exam.
Track when the pain starts and what changes it
Note when the pain began, where you feel it, how severe it is, and how long it lasts. Record whether it spreads or changes with movement, rest, or meals. Also note related symptoms, such as fever, stomach discomfort, urinary changes, or numbness.
Share relevant health and medication history
Tell the clinician about recent injuries, pregnancy, past cancer, infections, and existing health conditions. Share the medicines you take, too. This context can help guide which causes need to be considered.
Understand what an evaluation may involve
An assessment may include questions about your health and a physical exam. Depending on your symptoms and findings, a clinician may order urine or blood tests, imaging, or a referral to a specialist. Imaging isn’t needed for everyone with back pain.
The right response depends on the cause and warning signs
Back pain doesn’t always begin in the spine, and symptoms can point to more than one possible cause. General information from the National Institute of Neurological Disorders and Stroke, the NHS, and the Merck Manual describes a range of spinal and non-spinal causes. Your symptoms and health history help determine what to do next.
Use self-care only when symptoms are mild and no red flags are present
If the pain is mild and you have no warning signs, gentle movement within your comfort level may help. Avoid activities that clearly make it worse. Check with a healthcare professional before taking medicine, especially if you have other conditions or take other drugs.
Seek medical advice for persistent, recurring, or unexplained pain
Contact a healthcare professional if the pain isn’t improving, keeps returning, or gets in the way of daily activities. Do the same if you have other unexplained symptoms. A clinician can assess possible spinal and non-spinal causes and advise on care.
Back pain deserves attention to more than the spine
The back can be where pain is felt without being where the problem began. Organs, blood vessels, the hips, soft tissues, and nerves can all play a role. Seek urgent care for warning signs, and arrange an assessment for persistent or unexplained pain. Note any symptoms that come with the pain and share them with a healthcare professional.