Overview
A genitofemoral nerve block is a targeted treatment used when irritation of the genitofemoral nerve is contributing to groin or upper thigh pain. The genitofemoral nerve travels from the lower spine through the abdomen and into the groin region, where it supplies sensation to parts of the groin and upper thigh.
Irritation of this nerve may occur after hernia surgery, abdominal or pelvic surgery, trauma, inflammation, or nerve entrapment. Symptoms may include groin pain, upper thigh discomfort, burning sensations, or pain triggered by pressure, movement, or clothing.
A genitofemoral nerve block delivers medication around the nerve to reduce inflammation, calm nerve sensitivity, interrupt pain signals, and help confirm whether the genitofemoral nerve is contributing to symptoms.
Who this treatment helps
A genitofemoral nerve block may be suitable for people with:
- Groin pain or upper thigh discomfort
- Burning, tingling, or sharp nerve related symptoms
- Pain following hernia repair or abdominal surgery
- Pain worsened by pressure, movement, or clothing
- Suspected genitofemoral nerve irritation or neuralgia
- Limited improvement with medication or physiotherapy
A consultation is required to confirm suitability and determine whether the genitofemoral nerve is likely to be involved.
What is a genitofemoral nerve block
A genitofemoral nerve block is a targeted injection delivered near the genitofemoral nerve. The injection usually contains:
- Local anaesthetic to temporarily numb the nerve
- Steroid medication to reduce inflammation
Ultrasound guidance or CT guidance may be used to improve accuracy and safety. Relief after the injection can support the diagnosis and help guide the longer term treatment plan.
What to expect during the procedure
Your consultant will review the treatment plan and answer any questions before the procedure begins.
- You lie comfortably, usually on your back
- The skin over the treatment area is cleaned and numbed with local anaesthetic
- A fine needle is guided into position using imaging guidance
- Medication is delivered around the genitofemoral nerve
- You are monitored briefly before returning home
The procedure is usually completed as a day case and takes a short time to perform.
After the procedure
Temporary numbness in the groin or upper thigh can occur after the injection. Mild soreness at the injection site is also common for a short period.
Some people notice early improvement from the local anaesthetic, while steroid benefit may build gradually over several days.
Your consultant may advise:
- Avoid strenuous activity for 24 to 48 hours
- Wear loose clothing to reduce pressure on the area
- Continue physiotherapy if recommended
- Monitor symptoms and report any concerns
Benefits
- May reduce groin and upper thigh pain
- Useful for confirming nerve involvement
- Minimally invasive with short recovery time
- Can improve comfort with walking and daily activity
- May reduce reliance on medication
- Supports rehabilitation and activity progression
Possible risks and side effects
Genitofemoral nerve block is generally safe when performed by experienced clinicians, but all procedures carry some risk.
- Temporary increase in pain
- Local bruising or soreness
- Temporary numbness
- Infection, which is rare
- Bleeding
- Allergic reaction, uncommon
- Very rare irritation of nearby nerves or structures
When to consider other options
If symptoms suggest involvement of other nerves or pain pathways, your consultant may discuss ilio inguinal nerve block, pudendal nerve block, caudal epidural, pelvic floor therapy, or multidisciplinary pelvic pain management.
Safety note
Please inform your consultant about blood thinning medication, allergies, diabetes, pregnancy, or recent infection before treatment. Avoid driving if numbness persists after the procedure.
Arrange a consultation to discuss whether a genitofemoral nerve block may help relieve your groin or nerve related pain.
You can also explore our pelvic pain treatments, learn more about pudendal nerve block, ganglion impar block, or view all pain treatments.