Sciatica refers to pain that radiates along the path of the sciatic nerve, which branches from your lower back through your hips and buttocks and down each leg. Typically, sciatica affects only one side of your body.
Sciatica most commonly occurs when a herniated disk, bone spur on the spine or narrowing of the spine (spinal stenosis) compresses part of the nerve. This causes inflammation, pain and often some numbness in the affected leg.
Although the pain associated with sciatica can be severe, most cases resolve with non-operative treatments in a few weeks. People who have severe sciatica that's associated with significant leg weakness or bowel or bladder changes might be candidates for surgery.
The sciatic nerves branches from your lower back through your hips and buttocks and down each leg.
Pain that radiates from your lower (lumbar) spine to your buttock and down the back of your leg is the hallmark of sciatica. You might feel the discomfort almost anywhere along the nerve pathway, but it's especially likely to follow a path from your low back to your buttock and the back of your thigh and calf.
The pain can vary widely, from a mild ache to a sharp, burning sensation or excruciating pain. Sometimes it can feel like a jolt or electric shock. It can be worse when you cough or sneeze, and prolonged sitting can aggravate symptoms. Usually only one side of your body is affected.
Some people also have numbness, tingling or muscle weakness in the affected leg or foot. You might have pain in one part of your leg and numbness in another part.
Mild sciatica usually goes away over time. Call your doctor if self-care measures fail to ease your symptoms or if your pain lasts longer than a week, is severe or becomes progressively worse. Get immediate medical care if:
Sciatica occurs when the sciatic nerve becomes pinched, usually by a herniated disk in your spine or by an overgrowth of bone (bone spur) on your vertebrae. More rarely, the nerve can be compressed by a tumor or damaged by a disease such as diabetes.
Risk factors for sciatica include:
As your spine ages, it's more likely to experience bone spurs or herniated disks. These problems can reduce the amount of space available for your spinal cord and the nerves that branch off it.
The rubbery disks that lie between the vertebrae in your spine consist of a soft center (nucleus) surrounded by a tougher exterior (annulus). A herniated disk occurs when a portion of the nucleus pushes through a crack in the annulus. Symptoms may occur if the herniation compresses a nerve.
Although most people recover fully from sciatica, often without treatment, sciatica can potentially cause permanent nerve damage. Seek immediate medical attention if you have:
It's not always possible to prevent sciatica, and the condition may recur. The following can play a key role in protecting your back:
During the physical exam, your doctor may check your muscle strength and reflexes. For example, you may be asked to walk on your toes or heels, rise from a squatting position and, while lying on your back, lift your legs one at a time. Pain that results from sciatica will usually worsen during these activities.
Many people have herniated disks or bone spurs that will show up on X-rays and other imaging tests but have no symptoms. So doctors don't typically order these tests unless your pain is severe, or it doesn't improve within a few weeks.
If your pain doesn't improve with self-care measures, your doctor might suggest some of the following treatments.
The types of drugs that might be prescribed for sciatica pain include:
Once your acute pain improves, your doctor or a physical therapist can design a rehabilitation program to help you prevent future injuries. This typically includes exercises to correct your posture, strengthen the muscles supporting your back and improve your flexibility.
In some cases, your doctor might recommend injection of a corticosteroid medication into the area around the involved nerve root. Corticosteroids help reduce pain by suppressing inflammation around the irritated nerve. The effects usually wear off in a few months. The number of steroid injections you can receive is limited because the risk of serious side effects increases when the injections occur too frequently.
This option is usually reserved for when the compressed nerve causes significant weakness, loss of bowel or bladder control, or when you have pain that progressively worsens or doesn't improve with other therapies. Surgeons can remove the bone spur or the portion of the herniated disk that's pressing on the pinched nerve.
For most people, sciatica responds to self-care measures. Although resting for a day or so may provide some relief, prolonged inactivity will make your signs and symptoms worse.
Other self-care treatments that might help include:
Alternative therapies commonly used for low back pain include:
Not everyone who has sciatica needs medical care. If your symptoms are severe or persist for more than a month, though, make an appointment with your primary care doctor.
For radiating low back pain, some basic questions to ask your doctor include:
Don't hesitate to ask other questions.
Your doctor is likely to ask you a number of questions, such as: