FAQ · 15 questions
Questions people ask before they start
Answers with primary sources where they exist. If your question isn't here, email oliver@digitalsignet.com.
How long does sciatica usually take to settle?
Most sciatica improves substantially within 4 to 6 weeks of conservative care. Around 80 percent of cases resolve within 12 weeks regardless of treatment. The matched routines on this site are designed to compress that timeline and reduce recurrence, but if you're not noticeably better in 2 weeks of consistent daily practice, that's the signal to see a physiotherapist for hands-on assessment.
How long should I hold each sciatica stretch?
For the piriformis stretches, 45 to 60 seconds is the evidence-based hold time. Bandy and Irion's 1994 work showed 30 seconds is the threshold for meaningful tissue lengthening, and 45-60 seconds is the sweet spot for connective tissue without overuse irritation. The nerve floss is an exception, it's a pulse (alternating positions), not a hold, because sustained traction on an irritated nerve makes it worse.
Why does my nerve floss say "do NOT hold"?
Because nerve flossing is a glide, not a stretch. The technique alternates loading the foot end and the head end of the nerve so it slides in its sheath without sustained tension at either end. Holding the end position converts the glide into a sustained tensioner, which is the opposite of what an inflamed sciatic nerve needs. The therapeutic effect is the sliding motion itself.
Is it safe to stretch when sciatica is acute?
The gentle 4-minute acute flare routine is generally safe in the first 48 hours: it uses only flexion-tolerant positions (child's pose, supine piriformis), a controlled-range nerve glide, and avoids any extension load. Avoid the disc-bias McKenzie routine until pain has localised. If even gentle stretches make pain shoot further down the leg, stop and rest.
Should I see a physiotherapist or just keep stretching?
See a physiotherapist if: (1) symptoms haven't improved in 2 weeks of daily routine, (2) symptoms are worsening week-over-week, (3) any neurological signs appear (numbness, weakness, reflex changes), (4) you have red-flag symptoms (saddle anaesthesia, bowel/bladder changes, progressive foot drop), or (5) you have a complicated history (previous spine surgery, scoliosis, ankylosing spondylitis). A 30-minute hands-on assessment is more accurate than any self-test.
Can I make sciatica worse by doing the wrong stretches?
Yes, this is the most important reason this site splits routines by pattern. Disc-bias sciatica typically worsens with forward flexion (the piriformis-bias stretches like figure-4); piriformis-bias sciatica can be aggravated by aggressive extension that compresses the lumbar facet joints. The centralisation principle (does pain move up or down the leg during the stretch) is your real-time signal. If a stretch consistently makes pain move further down the leg, stop, that's the wrong direction for your case.
What's the difference between sciatica and a tight piriformis?
A tight piriformis is one cause of sciatica (called piriformis syndrome). Sciatica is the symptom (nerve pain along the sciatic distribution); piriformis tightness is one of the mechanisms that produces it. Other mechanisms include disc herniation (most common), spinal stenosis, and rarer causes like tumours or pregnancy-related compression. The disc-or-piriformis self-test on this site distinguishes the two most common mechanisms.
Will sitting on a tennis ball help my sciatica?
Direct compression on the piriformis (with a tennis ball, lacrosse ball, or specific massage tool) can help piriformis-bias sciatica by manually releasing the muscle. It will NOT help disc-bias sciatica, where the compression is at the spine, not the buttock, and can actually irritate the nerve further by adding pressure where it is already inflamed. Match the technique to the pattern.
Should I use heat or ice for sciatica?
Heat tends to help piriformis-bias sciatica by relaxing the muscle spasm. Ice tends to help acute disc-bias sciatica in the first 24-48 hours by reducing nerve root inflammation. In practice, most people get more relief from heat in the chronic phase and ice in the very acute phase. Both are short-term symptomatic relief; neither is a substitute for the matched stretch protocol.
Can sciatica come back? How do I prevent recurrence?
Yes, sciatica recurs in roughly 25-35 percent of people within a year. The strongest predictors of recurrence are sustained sitting time, low core stability, and tight hip flexors. The maintenance routine on this site is built for prevention: daily mixed-direction movement, piriformis lengthening, nerve glides for neural mobility, and gentle extension to counter sitting load. Daily 12 minutes is more protective than weekly 60-minute sessions.
Why does sciatica hurt more in the morning?
Two reasons. First, your spine decompresses overnight as fluid re-enters the discs (you're about 1cm taller in the morning), which transiently increases disc pressure and can press more on a sensitive nerve root. Second, six to eight hours of stillness lets the piriformis and lumbar paraspinals stiffen. Morning stretching, kept gentle for the first 30 minutes after waking, helps with both. Avoid aggressive extension press-ups in the first hour after waking.
Can I run with sciatica?
Cautiously, once acute pain has settled and you can walk without pain shooting down the leg. Avoid hill running (extension) and long road running (repetitive impact) in the early return. Soft surfaces (track, treadmill, trail) are kinder. Stop and re-triage if symptoms peripheralise. Runners often have piriformis-bias sciatica from chronically tight external rotators, so the figure-4 and supine piriformis stretches are core daily work.
Is sciatica common in pregnancy?
Yes. Pregnancy-related sciatica is mostly mechanical (changed lumbar curve, weight in front, relaxin loosening pelvic ligaments) rather than disc-driven, although true disc herniation does occur. The piriformis-bias routine is generally safe in pregnancy with modifications: avoid prone positions (prone cobra) from the second trimester onward, use the supine piriformis stretch with a wedge under the upper back if lying flat causes lightheadedness. See your midwife or obstetrician before any routine.
Should I get an MRI for sciatica?
Almost never as a first step. NICE NG59 and the 2018 Lancet series both recommend against routine imaging for sciatica because incidental disc findings (bulges, degenerative changes) are extremely common in pain-free adults: roughly 30 percent at age 20, over 90 percent by age 60. Seeing a disc bulge on a scan does not prove it is the source of pain. Imaging is appropriate only if red flags are present, if surgery is being considered, or after 6 weeks of failed conservative care.
When should I consider surgery for sciatica?
Surgery is appropriate for: (1) cauda equina syndrome, urgently; (2) progressive neurological deficit (worsening foot drop, expanding numbness); (3) sciatica that has failed 6-12 weeks of structured conservative care AND has imaging-confirmed nerve root compression matching the symptoms. Microdiscectomy outcomes are good in the right candidate. For most sciatica, conservative care produces equivalent results at 1-2 years according to the SPORT trial and follow-up reviews.
Last reviewed 2026-05-12
OW
Written by Oliver Wakefield-Smith, Founder of Digital Signet
Not a clinician. Every clinical claim on this site links to its primary source. If pain shoots down your leg, see a physiotherapist before continuing. Email corrections, fixed within 24 hours.