Herniated disc.
Usually less serious than you think.
A herniated disc (hernia nuclei pulposi, HNP) occurs when the soft core of an intervertebral disc pushes through the outer ring. This can put pressure on a nearby nerve root, causing pain, tingling or weakness in the leg (sciatica).
It sounds serious, but the good news is overwhelming: most herniated discs heal on their own.
70% shrinks on its own
In about 7 out of 10 herniated discs, the bulging material shrinks on its own. That is what you get when you put all the research on this together: 31 studies covering 2,233 people who did not have surgery (Zou et al., 2024). How far the material has come out makes a big difference: the same analysis gives roughly 1 in 8 for a slight bulge and nearly 9 in 10 for a fragment that has broken away completely. An earlier review saw the same pattern, with an even higher chance for those loose fragments (Chiu et al., 2015). One thing worth knowing: this was measured on scans, not on how people felt. With back pain, the picture and the symptoms often do not run in step. The good news stands either way: most people get better without surgery.
The Sciatica Trial (Peul et al., New England Journal of Medicine, 2007) showed that after 1 year, outcomes of surgery versus conservative treatment are equal. Surgery provides faster relief, but the end result is the same.
What does recovery look like?
Week 0–2
Often the most pain
Move gently within your pain limits; short walks help.
Week 2–6
Pain gradually eases
Build up activity step by step. Good and bad days are normal.
Week 6–12
High chance of recovery
For most people the symptoms have largely settled by now.
After week 12
Still significant symptoms?
Discuss next steps with your GP or physiotherapist.
This timeline is an average, not a promise. Some people are back to normal sooner, others take considerably longer, and that does not mean something is wrong. In the Sciatica Trial, people who did not have surgery recovered more slowly, but after a year both groups were in the same place.
Treatment
Keep moving
Bed rest is not recommended. Stay as active as possible within your pain limits. Walking is an excellent activity. Gradual build-up is key.
Pain medication
NSAIDs (ibuprofen, naproxen) have the best evidence, although the effect is small. For severe pain, your GP may prescribe something stronger for a short period. Paracetamol did not beat placebo in trials, but it is still the usual first step in the Netherlands because it carries the least risk.
Physiotherapy
A physiotherapist can help you with exercises, pain education and a progressive exercise programme. Direct access without referral has been possible since 2006.
Time and patience
For most people the symptoms settle over weeks to a few months. It is normal for recovery not to run in a straight line; there are good and bad days.
When IS surgery needed?
Cauda equina syndrome Emergency
Loss of bladder or bowel control, saddle-shaped numbness, increasing weakness in both legs. This needs surgery within 24 to 48 hours, so it has to be assessed today. Call your own GP, or the out-of-hours GP service outside office hours; they arrange the hospital referral. Only call 112 if you cannot get there yourself.
Progressive severe neurological deficit
Increasing muscle weakness (e.g. foot drop), severe sensory disturbances that do not improve after 6-8 weeks of conservative treatment.
Persistent severe pain
Unbearable pain that does not respond to medication and conservative treatment after 8-12 weeks. In this case, surgery can offer faster relief, although the end result after 1 year is comparable.
Key message
Most herniated discs heal on their own. A herniated disc on an MRI scan is no reason for panic. Surgery is only needed for cauda equina syndrome (emergency) or persistent severe neurological deficit. Keep moving, be patient, and seek physiotherapy guidance.
Next step