Lower back pain is very common. It can result from a strain (injury) to muscles or tendons in the back. Other causes include arthritis, structural problems and disk injuries. Pain often gets better with rest, physical therapy and medication. Reduce your risk of low back pain by keeping at a healthy weight and staying active.

Risk factors for lower back pain include:

Age: People over 30 have more back pain. Disks (soft, rubbery tissue that cushions the bones in the spine) wear away with age. As the disks weaken and wear down, pain and stiffness can result.
Weight: People who have overweight/obesity or carry extra weight are more likely to have back pain. Excess weight puts pressure on joints and disks.
Overall health: Weakened abdominal muscles can’t support the spine, which can lead to back strains and sprains. People who smoke, drink alcohol excessively or live a sedentary lifestyle have a higher risk of back pain.
Occupation and lifestyle: Jobs and activities that require heavy lifting or bending can increase the risk of a back injury.
Structural problems: Severe back pain can result from conditions, such as scoliosis, that change spine alignment.
Disease: People who have a family history of osteoarthritis, certain types of cancer and other disease have a higher risk of low back pain.
Mental health: Back pain can result from depression and anxiety.

Symptoms of lower back pain include:

Symptoms of lower back pain can come on suddenly or appear gradually. Sometimes, pain occurs after a specific event, such as bending to pick something up. Other times, you may not know what caused the pain.

Pain may be sharp or dull and achy, and it may radiate to your bottom or down the back of your legs (sciatica). If you strain your back during an activity, you may hear a “pop” when it happened. Pain is often worse in certain positions (like bending over) and gets better when you lie down.

Other symptoms of lower back pain include:

  • Stiffness: It may be tough to move or straighten your back. Getting up from a seated position may take a while, and you might feel like you need to walk or stretch to loosen up. You may notice decreased range of motion.
  • Posture problems: Many people with back pain find it hard to stand up straight. You may stand “crooked” or bent, with your torso off to the side rather than aligned with your spine. Your lower back may look flat instead of curved.
  • Muscle spasms: After a strain, muscles in the lower back can spasm or contract uncontrollably. Muscle spasms can cause extreme pain and make it difficult or impossible to stand, walk or move.

Causes

Many injuries, conditions and diseases can cause lower back pain. They include:

  • Strains and sprains: Back strains and sprains are the most common cause of back pain. You can injure muscles, tendons or ligaments by lifting something too heavy or not lifting safely. Some people strain their back by sneezing, coughing, twisting or bending over.
  • Fractures: The bones in the spine can break during an accident, like a car crash or a fall. Certain conditions (such as spondylolysis or osteoporosis) increase the risk of fractures.
  • Disk problems: Disks cushion the vertebrae (small spinal bones). Disks can bulge from their position in the spine and press on a nerve. They can also tear (herniated disk). With age, disks can get flatter and offer less protection (degenerative disk disease).
  • Structural problems: A condition called spinal stenosis happens when the spinal column is too narrow for the spinal cord. Something pinching the spinal cord can cause severe sciatic nerve pain and lower back pain. Scoliosis (curvature of the spine) can lead to pain, stiffness and difficulty moving.
  • Arthritis: Osteoarthritis is the most common type of arthritis to cause lower back pain. Ankylosing spondylitis causes lower back pain, inflammation and stiffness in the spine.
  • Disease: Spine tumors, infections and several types of cancer can cause back pain. Other conditions can cause back pain, too. These include kidney stones and abdominal aortic aneurysm.
  • Spondylolisthesis: This condition causes the vertebrae in the spine to slip out of place. Spondylolisthesis leads to low back pain and often leg pain as well.

Diagnosis

Your provider will ask about your symptoms and do a physical exam. To check for broken bones or other damage, your provider may order imaging studies. These studies help your provider see clear pictures of your vertebrae, disks, muscles, ligaments and tendons.

Your provider may order:

  • Spine X-ray, which uses radiation to produce images of bones.
  • MRI, which uses a magnet and radio waves to create pictures of bones, muscles, tendons and other soft tissues.
  • CT scan, which uses X-rays and a computer to create 3D images of bones and soft tissues.
  • Electromyography (EMG) to test nerves and muscles and check for neuropathy (nerve damage), which can cause tingling or numbness in your legs.
  • Depending on the cause of pain, your provider may also order blood tests or urine tests. Blood tests can detect genetic markers for some conditions that cause back pain (such as ankylosing spondylitis). Urine tests check for kidney stones, which cause pain in the flank (the sides of the low back).

Treatment

Lower back pain usually gets better with rest, ice and over-the-counter pain relievers. After a few days of rest, you can start to get back to your normal activities. Staying active increases blood flow to the area and helps you heal.

Other treatments for lower back pain depend on the cause. They include:

  • Medications: Your provider may recommend nonsteroidal anti-inflammatory drugs (NSAIDs) or prescription drugs to relieve pain. Other medications relax muscles and prevent back spasms.
  • Physical therapy (PT): PT can strengthen muscles so they can support your spine. PT also improves flexibility and helps you avoid another injury.
  • Hands-on manipulation: Several “hands-on” treatments can relax tight muscles, reduce pain and improve posture and alignment. Depending on the cause of pain, you may need osteopathic manipulation or chiropractic adjustments. Massage therapy can also help with back pain relief and restore function.
  • Injections: Your provider uses a needle to inject medication into the area that’s causing pain. Steroid injections relieve pain and reduce inflammation.
  • Surgery: Some injuries and conditions need surgical repair. There are several types of surgery for low back pain, including many minimally invasive techniques.