Percutaneous tibial nerve stimulation (PTNS)
A very thin needle placed near the inner ankle carries gentle electrical pulses up a leg nerve to the nerves that control the bladder. It is done in the clinic for 30 minutes once a week for 12 weeks, then less often to keep the benefit.
Also called PTNS, tibial nerve stimulation, posterior tibial nerve stimulation, PTNM, percutaneous tibial neuromodulation, TNS, Urgent PC, ankle needle treatment for bladder
- Where
- Clinic treatment room
- Anesthesia
- None needed. The needle is about as thin as an acupuncture needle.
- Time in the room
- 30 minutes of stimulation, about 40 to 45 minutes in the clinic
- Hospital stay
- Same day, every visit
- Back to normal
- Right away
- Back to work
- Same day
Overview
The tibial nerve runs down the inside of your leg to your foot. It comes from some of the same nerve roots in the lower spine as the nerves that control the bladder. PTNS uses a very thin needle placed near this nerve just above the inner ankle bone. A small battery-powered box sends mild pulses through the needle. The pulses travel up the leg to the lower spine, where they help calm the signals that cause sudden urges.
A standard course is 12 sessions, once a week, each lasting 30 minutes. If it helps, you keep the benefit with maintenance sessions, often about once a month. Results build slowly, so a fair trial means completing all 12 sessions.
PTNS has very few side effects. There is no medicine to take, nothing is implanted, and it does not cause trouble emptying the bladder. The trade-off is time: weekly visits for about 3 months and regular visits after that.
The parts of your body involved
The bladder is controlled by nerves that leave the spinal cord low in the back, at the sacral level. The tibial nerve branches from the large sciatic nerve, which carries fibers from several of the same sacral nerve roots. Near the ankle, the tibial nerve passes just behind the bony bump on the inside of the ankle (the medial malleolus), close to the skin. That makes it an easy place to reach with a fine needle.
- Tibial nerve
A nerve that runs down the back and inside of the leg to the sole of the foot. It controls muscles that curl the toes and carries feeling from the sole.
- Inner ankle bone
The bony bump on the inside of the ankle (the medial malleolus). The needle goes in a few finger-widths above it.
- Sacral nerves
Nerves at the base of the spine that carry signals to and from the bladder and pelvic floor.
- Spinal cord
Where signals from the leg and the bladder meet and are processed.
- Bladder
The organ that stores urine. In overactive bladder its muscle squeezes on its own.
Why it’s done
Your doctor may suggest PTNS for overactive bladder when lifestyle changes and pelvic floor exercises have not been enough, or when bladder medicines did not help or caused side effects. The AUA and SUFU guidelines list it as an option for people who can commit to the visit schedule.
- Avoiding or reducing medicines
Some people do not tolerate bladder pills because of dry mouth, constipation, or worries about memory with certain older medicines.
- No implant, no catheter risk
Nothing stays in the body, and PTNS does not cause trouble emptying the bladder.
- Very low risk
Side effects are mild and short-lived, which suits people with other health problems.
- You can come in weekly
PTNS works best for people who can keep a steady weekly schedule for 3 months.
- A step before more involved treatments
Many people try PTNS before Botox injections or an implanted stimulator.
Other options
- Lifestyle changes and bladder training
Cutting back on caffeine and alcohol, spacing fluids, timed voiding, urge-suppression techniques, and pelvic floor exercises.
- Medicines
Beta-3 agonists such as mirabegron or vibegron, and antimuscarinic medicines, relax the bladder.
- Bladder Botox injections
Office injections into the bladder wall, repeated about every 6 to 12 months. Usually a stronger effect than PTNS, with a small risk of needing a catheter.
- Sacral neuromodulation
An implanted device that stimulates the sacral nerves directly. You try it for a short test period first.
- Implanted tibial nerve stimulators
Small devices placed under the skin near the ankle have become available in recent years. They stimulate the same nerve without weekly visits.
Getting ready
Tick items off as you go. Your checklist is saved on this device only.
Before your first session
During the 12 weeks
The day of each session
The procedure, step by step
Press play or pick a step. Each drawing shows what your surgeon is doing at that moment. Your team may do some steps differently.
1. Getting comfortable
You sit in a reclining chair with your leg raised and your foot supported, knee slightly bent and turned out. The session is usually done by a nurse or other trained clinician.
After the procedure
Right afterward
- Straight home
There is no recovery time. You can leave as soon as the needle is out.
- Small bandage
A small adhesive bandage covers the needle spot. You can remove it later the same day.
- Diary notes
Note anything you noticed during the session in your diary, such as where you felt the tingling.
- Next session
Confirm your next weekly appointment before you leave.
At home
- The ankle
The needle spot may be slightly sore or bruised for a day. A tiny drop of blood is normal.
- Tingling
Some people notice mild tingling or numbness in the foot for a short time after a session. It fades within hours.
- Activity
Everything is normal right away, including exercise.
- Driving and showering
You can drive yourself home and shower the same day.
- Your diary
Keep tracking trips, urges, and leaks. Changes often appear gradually rather than all at once.
- Medicines
Keep taking your usual medicines unless your doctor tells you otherwise. Some people use PTNS together with a bladder medicine.
- Missed sessions
If you miss a week, book a make-up session as soon as you can. Long gaps can slow progress.
- Work
You can go back to work the same day.
Recovery timeline
- Session 1Getting to know it
You learn what the stimulation feels like. There is no change in the bladder yet.
- Sessions 2 to 5Early weeks
Most people notice little change. This is expected.
- Sessions 6 to 12Changes appear
Many people who respond start to notice fewer or milder urges, often first at night.
- Week 12The review
You and your doctor compare your diary with your starting point and decide whether PTNS is working for you.
- Months 4 to 6Spacing out
If it worked, sessions are gradually spaced out, for example every 2 weeks and then every 3 to 4 weeks.
- Year 1 and beyondMaintenance
Most people who keep their benefit need a session about once a month, adjusted to their symptoms.
What it feels like
Most people find PTNS easy. The needle is so thin that many barely feel it. The harder part is the routine: setting aside about an hour each week, and staying patient during the first several weeks when not much seems to change.
The first needle
Many people expect it to hurt. Most feel a tiny prick, or nothing at all.
What helpsLook away and breathe out as the needle goes in.
Turning up the current
A tingling or pulsing in the sole of the foot, and your toes may curl on their own. It feels odd, but it should not hurt.
What helpsSpeak up about what you feel. The level can be set exactly where it is comfortable.
The 30 minutes
Some people find it boring; others find it a rare half hour of quiet.
What helpsBring a book, music, or a podcast.
The early weeks
Little or no change in your bladder, and the temptation to give up.
What helpsKeep your diary and complete all 12 sessions before you judge the result.
Around the halfway point
For people who respond, the first sign is often fewer urgent trips or one less trip at night. Hope starts to build.
What helpsCompare your diary with your starting week. Small changes add up.
Maintenance
Fitting regular visits into life can be a chore, and symptoms may creep back if sessions are spaced too far apart.
What helpsWork with your team to find the longest interval that still keeps your symptoms controlled.
How well it works
PTNS helps many, but not all, people. In the main trial that compared it with a fake (sham) treatment, about 55 out of 100 people reported moderate or marked improvement after 12 weeks, compared with about 21 out of 100 with the sham. People who respond often keep their benefit for years with regular maintenance sessions.
- Bladder diary
Fewer daily trips, fewer urges, fewer leaks, and fewer nighttime trips are the main measures.
- The 12-week check
Your doctor reviews your diary and how you feel to decide whether to continue.
- Maintenance
The benefit usually fades without maintenance sessions. The schedule is tailored to you.
- Combining treatments
If PTNS helps only partly, it can be combined with a bladder medicine.
Risks
Every operation has risks. These are the ones people ask about most, with honest odds where good numbers exist. Your surgeon’s own results matter more than averages.
Common
PTNS does not help everyone. If it does not work after 12 sessions, other options remain open.
Brief soreness during or after a session.
At the needle spot. More likely if you take blood thinners.
Less common
Usually fades within hours.
Some people feel faint with needles. Tell the nurse; lying back usually helps.
Usually stops with a few minutes of firm pressure.
Rare
Redness, warmth, or swelling around the spot.
Rare. Tell your team if pain or numbness does not settle.
Call your care team or go to the emergency room if
- Redness, warmth, swelling, or pus at the needle spot, or red streaks going up the leg
- Fever of 101°F (38.3°C) or higher
- Numbness, burning pain, or weakness in the foot that lasts more than a day
- Bleeding from the needle spot that does not stop after 10 minutes of firm pressure
- Fainting, or chest pain during or after a session (call 911 for chest pain)
Questions to ask your surgeon
- Am I a good candidate for PTNS, given my other health conditions?
- Who will do my sessions, and will it be the same leg each time?
- How will we measure whether it is working?
- What happens if I miss a week?
- Should I keep taking my bladder medicine during the course?
- If it works, how often will I need maintenance sessions?
- Does my insurance cover all 12 sessions and maintenance?
- If it does not work, what would we try next?
- Would an implanted tibial nerve stimulator make sense for me?
Words you may hear
- PTNS
- Percutaneous tibial nerve stimulation: stimulating the tibial nerve through a fine needle placed through the skin.
- Tibial nerve
- A nerve running down the inside of the leg to the sole, sharing nerve roots with the bladder nerves.
- Medial malleolus
- The bony bump on the inside of the ankle.
- Neuromodulation
- Changing how nerves signal by using mild electrical pulses.
- Overactive bladder
- Sudden urges to urinate, usually with frequent trips, with or without leaking.
- Urge incontinence
- Leaking urine with or right after a sudden urge.
- Grounding pad
- A sticky pad on the foot that completes the electrical circuit.
- Bladder diary
- A record of when you urinate, your urges, and any leaks.
- Maintenance therapy
- Regular sessions after the first 12 to keep the benefit.
- Sacral nerves
- Nerves at the base of the spine that control the bladder and pelvic floor.
- Sham treatment
- A fake treatment used in research to compare against the real one.
Common questions
Is this acupuncture?
It uses a needle of similar size, but it is aimed at a specific nerve and delivers a measured electrical current.
Does it hurt?
Most people feel a tiny prick when the needle goes in and then tingling in the foot. It should not be painful. Tell the nurse if it is, and the level will be lowered.
How soon will I know if it works?
Many people who respond notice changes in the second half of the 12 weeks. Your doctor will review your diary at the end of the course.
What if I cannot come every week?
Regular weekly sessions work best. If weekly visits are not possible, ask about other options such as Botox or an implanted device.
Can I do it at home?
Standard PTNS is done in the clinic. Some devices use a skin patch at home instead of a needle, but the evidence for them is more limited. Implanted tibial nerve stimulators are another way to avoid weekly visits.
Can I have PTNS if I have a pacemaker or am pregnant?
PTNS is usually not used in people with a pacemaker or implanted defibrillator, or during pregnancy. Ask your doctor about other options.
Sources this page draws on
- American Urological Association / SUFU, The AUA/SUFU Guideline on the Diagnosis and Treatment of Idiopathic Overactive Bladder (2024)
- Journal of Urology (Peters and colleagues), Randomized trial of percutaneous tibial nerve stimulation versus sham efficacy in the treatment of overactive bladder syndrome: results from the SUmiT trial (2010)
- Journal of Urology (Peters and colleagues), Percutaneous tibial nerve stimulation for the long-term treatment of overactive bladder: 3-year results of the STEP study (2013)
- Urology Care Foundation, Overactive Bladder (OAB)
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), Treatments for Bladder Control Problems (Urinary Incontinence)
Written November 2026. This page explains what usually happens. It is not medical advice and does not replace a conversation with your own surgeon, whose plan for you comes first.