An inguinal hernia can contribute to back pain, though it’s not the most common symptom. The groin is the primary site of discomfort, but the nerves involved in that area originate from the lower spine, creating a pathway for pain to travel to the lower back. Understanding this connection matters because back pain alongside groin discomfort can also signal a spinal problem that mimics or coexists with a hernia.
How an Inguinal Hernia Can Cause Back Pain
The key lies in shared nerve roots. The ilioinguinal nerve, which runs through the inguinal canal (the same passage where the hernia bulges), originates from the T12 and L1 nerve roots at the very bottom of the thoracic spine and top of the lumbar spine. When a hernia presses on or irritates this nerve, pain doesn’t always stay in the groin. It can radiate to the lower back, the hip, or the upper thigh.
This kind of referred pain tends to be dull and achy rather than sharp. It often worsens with activities that increase pressure in the abdomen: lifting, coughing, straining during a bowel movement, or standing for long periods. If your back pain follows this pattern and gets better when you lie down (which also reduces the hernia’s protrusion), the hernia is a likely contributor.
Some people also develop back pain indirectly. A hernia that causes persistent groin discomfort can change the way you walk, stand, or bend. Over weeks and months, these compensatory movements put extra strain on the muscles and joints of the lower back, producing pain that feels unrelated to the groin but traces back to it.
Back Pain After Hernia Repair Surgery
It’s worth noting that back and groin pain can also develop or persist after surgical repair. A meta-analysis of over 29,000 patients found that about 17% develop chronic pain following inguinal hernia surgery. Risk factors for this persistent pain include younger age, being female, having pain before the operation, and having had a previous hernia repair on the same side. The pain is often related to nerve irritation from the surgical mesh or scar tissue forming around the ilioinguinal nerve.
If you had a hernia repaired and now have new or ongoing back pain, this is a recognized complication, not something you’re imagining. It typically improves over the first year but can sometimes require additional treatment.
When Back Pain Points to a Spinal Problem Instead
Here’s where things get tricky. Problems in the upper lumbar spine (specifically the L1 and L2 discs) can cause groin pain that feels almost identical to an inguinal hernia. A study of patients with upper lumbar disc herniations found that only 24% had the “classic” symptom of anterior thigh or groin pain, meaning these disc problems are frequently missed or misdiagnosed.
A few features can help distinguish the two:
- Visible bulge. An inguinal hernia usually produces a noticeable bulge in the groin, especially when standing or straining. A spinal disc problem does not.
- Pain with spinal movement. If bending forward, twisting, or sitting for long periods makes the pain significantly worse, a disc issue is more likely.
- Numbness or tingling. Sensory changes in the front of the thigh, the groin, or the genital area suggest nerve compression in the spine rather than a hernia.
- Bowel or bladder changes. Though rare (occurring in only about 2.4% of upper lumbar disc cases), any loss of bowel or bladder control alongside back and groin pain is a medical emergency that points to spinal nerve compression.
The overlap between these two conditions means both should be considered when someone has groin pain paired with back pain, particularly if one diagnosis alone doesn’t fully explain the symptoms.
Getting the Right Diagnosis
Physical examination is the starting point for an inguinal hernia. A doctor can often feel the bulge during a cough test. But when the exam is inconclusive, or when back pain muddies the picture, imaging helps sort things out.
Ultrasound is the standard first-line imaging for a suspected hernia. It’s quick, inexpensive, and good at confirming a hernia that’s already suspected. But it has limitations. In patients with vague or overlapping groin and back pain, ultrasound can miss the diagnosis or fail to identify alternative causes.
Dynamic MRI, where images are captured while the patient strains or bears down, has substantially higher diagnostic accuracy than both physical examination and ultrasound for ruling a hernia in or out. In one study, patients whose ultrasound and physical exam were inconclusive underwent dynamic MRI. Among those where the hernia was ruled out, the MRI identified other pain sources: femoral hernias, musculoskeletal problems, lymph node enlargement, and even conditions like endometriosis. These patients were then referred to the appropriate specialists instead of continuing to chase the wrong diagnosis.
If you have both groin and back symptoms and your initial workup hasn’t provided a clear answer, asking about MRI imaging is reasonable. The goal is to avoid treating one condition while missing the actual source of pain.
What Typically Helps
If an inguinal hernia is confirmed as the source of both your groin and back pain, surgical repair is the definitive treatment. Most repairs are done laparoscopically, with recovery taking two to four weeks for light activity and six weeks before returning to heavy lifting. In many cases, the back pain resolves once the hernia is no longer pressing on surrounding nerves and you stop compensating with altered movement patterns.
For people with small, minimally symptomatic hernias who are managing with watchful waiting, the back pain component can sometimes be addressed with core-strengthening exercises that support the lower spine and reduce strain on the abdominal wall. Avoiding activities that spike abdominal pressure, like heavy deadlifts or prolonged straining, can also keep both the groin and back symptoms from worsening.
If the back pain persists after hernia repair, or if imaging reveals a spinal issue alongside the hernia, treatment shifts to addressing the lumbar spine. Physical therapy targeting the lower back, nerve-gliding exercises, and activity modification are the typical first steps before considering more invasive options.