An epidural steroid injection delivers a small dose of anti-inflammatory medication into the space around an irritated spinal nerve root. It is used mainly for leg or arm pain radiating from a herniated disc or spinal stenosis, when several weeks of conservative treatment have not brought enough relief. It is performed under X-ray or ultrasound guidance in a clinic setting and takes a few minutes; the aim is to reduce pain enough to move, sleep and rehabilitate.
What the injection actually does
Sciatica and similar radiating pain are usually caused by inflammation around a nerve root, most often where a bulging or herniated disc presses on it as it leaves the spine. The pain travels along the path of that nerve, into the buttock and leg, or into the shoulder and arm in the neck.
An epidural injection places a corticosteroid, often with a small amount of local anaesthetic, into the epidural space that surrounds the nerve roots. The steroid calms the inflammation of the nerve and its surroundings. It does not shrink the disc or repair anything; what it does is lower the level of irritation so that the body’s own recovery, which happens in the majority of disc herniations, can proceed with less pain. The local anaesthetic can give rapid but short-lived relief, and it also helps the physician confirm that the treated nerve is indeed the source of the pain.
Who is a suitable candidate
The injection is most useful when the pain is predominantly in the limb rather than the back itself, when imaging shows a finding that matches the symptoms, and when a fair trial of conservative treatment has not been enough. It is typically considered:
- For sciatica or radiating arm pain from a herniated disc that has not settled after roughly four to six weeks of activity modification, medication and physiotherapy.
- For leg pain and heaviness on walking caused by spinal stenosis, especially in older patients who want to avoid or delay surgery.
- When severe pain prevents participation in physiotherapy, and a period of relief would allow rehabilitation to begin.
- As a diagnostic step before surgery, to help clarify which level is responsible for the pain.
It is not a treatment for purely mechanical low back pain without nerve involvement, and it is not a substitute for urgent surgical assessment when there is progressive weakness, numbness in the saddle area or loss of bladder or bowel control. Those symptoms need immediate medical attention.
The decision is made by a pain physician after reviewing the history, the examination and the imaging. Patients on blood thinners, with diabetes, an active infection or an allergy to contrast or steroids need to discuss the details in advance, because the plan may need adjusting. At a multi-specialty center, the pain physician and the spine orthopedist frequently review the same case together, so the injection and a possible surgical opinion are coordinated rather than competing.
How the procedure is performed
The injection is performed in a procedure room, not an operating theatre, and general anaesthesia is not required. You lie on your front or side, the skin is cleaned and numbed with local anaesthetic, and the physician uses live X-ray (fluoroscopy) or ultrasound to guide a fine needle to the exact target. A small amount of contrast dye is usually injected to confirm the position on the screen before the medication is given.
There are three main approaches: interlaminar, where the needle enters between the vertebral arches; transforaminal, where it is directed to the opening through which the specific nerve root exits; and caudal, from the base of the spine. The choice depends on the level, the anatomy and the imaging findings, and the physician will explain which is planned and why.
The injection itself takes a few minutes. Most people describe pressure or a brief reproduction of their usual leg or arm pain when the medication reaches the nerve. Afterwards you rest for a short observation period and can usually go home within the hour, with someone else driving.
What to expect in the days and weeks afterwards
The local anaesthetic may make the leg or arm feel numb or weak for a few hours; this wears off. Some people notice a temporary increase in pain for a day or two before the steroid takes effect, which normally happens within three to seven days. Relief can last from several weeks to many months, and in a proportion of patients the episode settles fully once the inflammation is controlled.
Practical guidance for the first days is simple: gentle walking is encouraged, heavy lifting and vigorous exercise are avoided for a couple of days, and the injection site is kept clean. People with diabetes should monitor blood glucose more closely for a few days, since steroids can raise it temporarily. Facial flushing, a mildly disturbed night’s sleep or a feeling of warmth are common and pass quickly.
Serious complications are rare when the procedure is performed under imaging guidance by an experienced physician, but you should contact the clinic or seek urgent care for fever, severe headache that worsens on standing, new or worsening weakness, or any change in bladder or bowel function.
How injections fit into a wider plan
An epidural injection works best as part of a plan, not as a stand-alone fix. The window of relief is the time to strengthen the back and core, correct posture and load habits, and address weight or work factors that contribute to the problem. Injections are generally limited to a small number in a given year, and if a first injection gives no benefit at all, repeating it is usually not the answer; the physician reconsiders the diagnosis and the alternatives.
If you are weighing an injection or want a structured plan for radiating back or neck pain, a consultation at a pain management clinic in Modi’in allows the physician to examine you, review your imaging and discuss whether this treatment is appropriate for you. The information here is general; only a personal assessment can determine what is right in your case.
Frequently asked questions
Does an epidural steroid injection hurt?
Most people feel pressure and a brief reproduction of their usual radiating pain when the medication reaches the nerve. The skin is numbed first, and the procedure takes a few minutes. Discomfort is usually described as manageable, and sedation is rarely needed.
How soon does it work and how long does it last?
The anaesthetic can give relief within minutes, which may fade after a few hours. The steroid usually begins to work within three to seven days. The benefit varies: some patients gain weeks, others many months, and in some the episode settles completely as the inflammation resolves.
Can I have the injection if I take blood thinners?
Often yes, but not without planning. Some medications need to be paused for a defined period, and this must be agreed with the prescribing doctor beforehand. Tell the pain physician about every medication and supplement when the appointment is booked.
Do I need a referral for a private pain clinic consultation in Israel?
No. A private specialist consultation does not require a referral or Form 17. Bring your MRI or CT on disc or by link, any previous reports and a list of medications. Private consultations are usually reimbursable under supplementary health-fund plans and private policies, subject to the policy terms.