Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor provides Selective Nerve Root Blocks?
A selective nerve root block is usually done by a pain management doctor, a physiatrist, an anesthesiologist, or a spine surgeon. A physiatrist treats pain and physical function; an anesthesiologist gives numbing medicine and sedation. Your regular doctor can refer you to one of them.
What it is
A selective nerve root block is an injection of numbing medicine, and often a steroid, placed right next to one nerve root. The goal is to find out which nerve is causing pain and, in many cases, to calm that pain down.
Why a doctor might recommend it
Doctors use this injection for pain that travels from the spine into an arm or a leg, often called radiculopathy. Common causes include a herniated disc or narrowing of the spaces in the spine. The injection works as both a test and a treatment: numbing one nerve shows whether it is the pain source, and the steroid may ease pain for weeks or months.
How to prepare
- Ask which regular medicines to skip before the procedure, especially blood thinners.
- Tell the care team about all allergies.
- Arrange for someone to drive you home.
What happens during it
You lie face down while the doctor numbs the skin and, using X-ray or ultrasound guidance, guides a thin needle next to the nerve root. Contrast dye may confirm placement before the medicine goes in. The visit often takes under an hour, and you go home the same day.
Recovery
Most people rest for the day and resume normal activities within a day or two. The arm or leg may feel numb for a few hours. Relief can be immediate or build over several days.
Risks and side effects
Serious problems are uncommon. Side effects include soreness, temporary numbness, headache, or a brief pain flare. Rare risks include infection, bleeding, or nerve injury. People with diabetes may see a short rise in blood sugar.
Who performs it
Trained specialists perform these injections, most often pain management doctors, physiatrists, anesthesiologists, or spine surgeons. A primary care doctor can manage simple back pain and will refer you to a specialist if pain is severe or comes with numbness or weakness.
Common questions
Does the injection hurt?
Most people feel a quick sting from the skin-numbing medicine and some pressure when the steroid goes in. The area is numbed first, so the procedure itself is usually well tolerated.
How long does the pain relief last?
It varies a lot. Some people get relief for a few weeks and others for several months, and some get little relief at all. The result also helps your doctor decide on next steps.
Can I go back to work the next day?
Many people can, as long as their job is not physically demanding. Your doctor will give you specific instructions based on your situation.
Will the injection fix my spine problem?
No, it does not repair a disc or reverse narrowing. It eases pain and swelling around the nerve while your body heals or while you and your doctor plan other treatments.
Sources
- MedlinePlus - Epidural injections for back pain
- MedlinePlus - Orgasmic dysfunction in women: MedlinePlus Medical Encyclope
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
