Sciatica: what it is, how long it lasts and what actually helps

Sciatica happens when the sciatic nerve, which runs from the lower back down to the foot, is irritated or compressed [1]. It usually affects one leg, with sharp or burning pain, pins and needles, numbness or weakness, and the leg often hurts more than the back [1]. In most cases the cause is a herniated disc [3].

Estimates of how many people have it vary widely, from 1.2% to 43%, largely because studies define sciatica differently [2]. If you have it, here is what the research says, including the parts that are less certain than you may have heard.

How long does it last?

The NHS says sciatica usually gets better in a few weeks to a few months, though it can last longer [1]. Studies measure recovery in different ways, so their numbers cannot be combined, but they give a useful picture:

Study	Who was studied	Result
Vroomen, 1999 [4]	183 people with sciatica severe enough for bed rest to be prescribed	87% said they had improved at 12 weeks
ATLAS, 2018 [5]	609 UK primary care patients with back-related leg pain	55% improved at 12 months, using a strict definition (at least 30% less disability)

In the ATLAS study, people who believed their problem would last a long time had worse outcomes [5]. That does not prove that expectations cause the outcome, but it is one reason a clear explanation of your condition is worthwhile.

Should you rest in bed?

No. In a trial of people with severe sciatica, two weeks of bed rest worked no better than staying up and about [4], and a Cochrane review found little or no difference in pain or function between advice to rest in bed and advice to stay active [6]. In other words, bed rest does not help. Guidance from the UK encourages people to continue with normal activities as much as possible and to avoid sitting or lying down for long periods [1] [7].

Does physical therapy help?

The best local evidence comes from right here. A randomized trial at two health systems in Salt Lake City enrolled 220 adults who had had sciatica for less than 90 days. Everyone got education, and half were also referred for four weeks of physical therapy, focused on exercise and hands-on treatment [8]:

Oswestry disability score (0 to 100, lower is better)	Usual care	Early physical therapy	Difference
After 4 weeks	28.1	19.9	8.2 points
After 6 months	19.8	14.5	5.4 points
After 1 year	19.2	14.4	4.8 points

Adjusted scores. Source: Fritz et al., Annals of Internal Medicine, 2021 [8].

At one year, 45% of the physical therapy group rated their treatment a success, compared with 28% of the usual care group [8]. The authors concluded that early physical therapy can be offered as first-line non-drug care [8].

The honest caveats:

• Only the 4-week difference reached the size the authors consider clearly meaningful (6 to 8 points). Both groups improved a lot [8].
• Leg pain was no different between the groups at 6 months or 1 year, and neither was health care use or missed work [8].
• More than a third of the physical therapy group reported side effects, mostly more back pain and stiffness [8].
• A 2023 review of 18 trials found “inadequate evidence” to make clinical recommendations about physiotherapy for sciatica, because of study quality and mixed results [9].

So physical therapy is a reasonable first step that may speed up recovery, but it is not a guaranteed fix. UK guidance recommends considering group exercise, and using manual therapy only as part of a package that includes exercise. It advises against belts, corsets and traction [7].

What about medicines?

Some common medicines work less well than many people expect:

• Pregabalin and gabapentin. In a trial of 209 people, pregabalin did not reduce leg pain compared with placebo and caused more side effects [10]. A review of 9 trials found moderate- to high-quality evidence that these anticonvulsants are ineffective for low back pain and lumbar radicular pain [11].
• UK guidance says not to offer gabapentinoids, other antiepileptics, oral corticosteroids or benzodiazepines for sciatica, and not to offer opioids for chronic sciatica. It also warns about the harms and limited benefit of anti-inflammatories (NSAIDs) [7].

If you already take any of these, do not stop on your own. Talk to your prescriber.

When is surgery the right call?

Surgery can make sense for some people, and the key trade-off is speed versus long-term difference:

• In a Dutch trial of 283 people with severe sciatica lasting 6 to 12 weeks, early surgery brought faster relief, but after one year the two groups were similar, and 39% of the group that started with conservative care ended up having surgery [12].
• In a review of 24 trials, the advantage of disc surgery for leg pain was greatest early on and declined over time, with low to very low certainty of evidence [3].
• For sciatica lasting 4 to 12 months, a Canadian trial found that surgery gave clearly better leg pain relief at 6 months than continued non-surgical care [13].

If your pain is severe or has lasted for months, it is worth discussing surgery with a spine specialist. UK guidance suggests considering it when non-surgical treatment has not helped and imaging matches your symptoms [7].

Emergency warning signs

Very rarely, a nerve problem called cauda equina syndrome can cause permanent damage. It affects about 1 to 3 people in 100,000, but it needs emergency care [14].

Call 911 or go to the emergency room, and do not drive yourself, if you have [1] [14]:

• Sciatica in both legs, or severe or worsening weakness or numbness in both legs
• Numbness around your genitals, buttocks or anus, or altered feeling when you wipe
• New trouble starting to urinate, being unable to urinate, or losing control of your bladder
• Not noticing when you need a bowel movement, or losing bowel control
• New sexual problems, such as loss of genital sensation

The takeaway

• Sciatica usually improves over weeks to months, though it can last longer.
• Bed rest does not help; staying as active as you can is the recommended approach.
• Early physical therapy was linked to faster improvement in a Utah trial, but the long-term gains were modest and the wider evidence is mixed.
• Common nerve pain medicines have not been shown to help, and surgery gives faster relief for some people, with less difference over time.
• Numbness around the genitals, bladder or bowel changes, or symptoms in both legs are an emergency.

You can start physical therapy in Utah without a referral. If leg pain is limiting your day, an evaluation can check for warning signs and help you decide on next steps.