Most people who go to the hospital for sciatica pain will be evaluated, given medication to bring the pain under control, and sent home the same day. Only about 1 to 2% of people who visit an emergency department for low back pain end up being admitted. The hospital’s main job is to rule out anything dangerous, get your pain to a manageable level, and set you up with a plan for recovery outside the hospital.
What Happens When You Arrive
The first thing the emergency team does is check for red flags, meaning signs that something more serious than a pinched nerve is going on. They’ll ask pointed questions: Can you control your bladder and bowels? Do you have numbness between your legs or around your groin (called the “saddle area”)? Is the weakness in your legs getting worse? These questions screen for a rare but serious condition called cauda equina syndrome, where the bundle of nerves at the base of the spine is severely compressed. That condition is a surgical emergency, but it affects a very small number of people with sciatica symptoms.
A doctor or nurse will also do a physical exam. One of the most common tests is the straight leg raise: you lie on your back while someone lifts your straightened leg upward at the hip. If this reproduces your shooting leg pain, it strongly suggests a nerve root is being compressed. They may also test your reflexes at the knee and ankle, check sensation in your lower legs and feet, and ask you to walk on your heels and toes to assess muscle strength. These tests help pinpoint which nerve is involved and how severely it’s affected.
Imaging and Further Tests
Not everyone who comes to the ER with sciatica gets imaging. If your neurological exam is normal and there are no red flags, guidelines generally recommend against rushing to an MRI or CT scan because most sciatica improves on its own within weeks. Imaging becomes important when the doctor finds progressive weakness, suspects cauda equina syndrome, or thinks there could be an infection, fracture, or tumor. In those cases, an MRI is the preferred test because it shows soft tissue like discs and nerves clearly. A CT scan may be used if an MRI isn’t available quickly.
How They Treat the Pain
The ER’s goal is to bring your pain down enough that you can function and recover at home. The most commonly used medications in emergency departments for this type of pain are ibuprofen (given to roughly 28% of patients), acetaminophen (about 22%), and stronger pain relievers like hydromorphone for severe cases (about 25%). These numbers come from a large Canadian emergency department study, and the pattern is similar across most hospitals: anti-inflammatory drugs first, with stronger options reserved for people in extreme distress.
Clinical guidelines recommend acetaminophen as the first choice, with anti-inflammatory drugs like ibuprofen or ketorolac (a stronger injectable anti-inflammatory) as the second line. Muscle relaxants and short courses of oral steroids are sometimes added. Opioid painkillers are used cautiously and typically only when other options haven’t worked, because they carry risks of dependence and don’t address the underlying nerve irritation.
You may also receive medication through an IV if your pain is severe enough that swallowing pills isn’t going to cut it. Ketorolac, for example, can be injected and tends to work faster than oral ibuprofen. The combination of an anti-inflammatory with acetaminophen is a common approach because the two drugs work through different pathways and together provide better relief than either one alone.
When the Hospital Keeps You
Hospital admission for sciatica is uncommon. Hospitalization rates for low back pain average around 1.2%, peaking at 2.4% in recent years. You’re more likely to be admitted if you have signs of cauda equina syndrome, which requires emergency surgery to decompress the nerves. Bilateral leg symptoms (pain or weakness in both legs) and rapidly worsening neurological deficits are definite red flags that trigger urgent senior doctor involvement and likely admission.
The specific warning signs that change the situation from “go home and recover” to “we need to act now” include loss of bladder or bowel control, numbness in the groin and inner thighs, and significant leg weakness that’s getting worse over hours or days. If any of these are present, imaging and surgical consultation happen urgently.
Epidural Steroid Injections
Epidural steroid injections aren’t typically done in the emergency room itself, but they’re one of the most common hospital-based treatments for sciatica that doesn’t resolve with initial care. A doctor injects an anti-inflammatory medication into the epidural space surrounding your spinal nerves. The procedure is done under imaging guidance and usually takes 15 to 30 minutes.
There are three approaches a doctor can use to reach the epidural space: between the vertebrae (interlaminar), through the small openings where nerves exit the spine (transforaminal), or through an opening near the tailbone (caudal). The choice depends on which nerve root is affected and the doctor’s assessment of your anatomy. Pain relief from these injections most often lasts three months or more, with some people experiencing relief up to 12 months. However, results vary, and some people don’t get meaningful relief at all. These injections are generally considered safe, though temporary side effects like lightheadedness from a drop in blood pressure can occur.
What Happens at Discharge
Before you leave, the hospital team should do more than just hand you a prescription. Guidelines call for a clear explanation that most sciatica follows a benign course, meaning the pain will likely improve significantly over several weeks even though it feels terrible right now. You should be encouraged to keep moving as much as your pain allows, since bed rest has been shown to slow recovery rather than help it.
You’ll typically leave with a plan that includes pain medication (usually a combination of anti-inflammatories and acetaminophen), a referral to a physiotherapist, and specific guidance on when to come back. The return-to-ER criteria are important: if you develop new bladder or bowel problems, worsening numbness in the groin area, or progressive leg weakness after discharge, that warrants an immediate return.
Many hospitals refer patients directly to an in-house physiotherapist before discharge, especially larger emergency departments. If that’s not available, you should receive a referral to outpatient physiotherapy or instructions to arrange this through your primary care doctor. Early physiotherapy is a consistent recommendation across clinical guidelines because it helps you regain mobility, strengthens the muscles supporting your spine, and reduces the chance of the pain becoming a long-term problem. Some hospitals also screen for psychological risk factors like fear of movement or catastrophic thinking about pain, which are known to slow recovery and may prompt a referral to a psychologist or social worker.