Pain that shows up in both the testicles and the lower back often traces to shared nerve pathways that connect these two regions. The testicles develop high in the abdomen during fetal life and drag their nerve supply down with them as they descend into the scrotum, which means problems in the spine, kidneys, abdomen, or pelvis can all generate pain that lands in both places at once. The combination is common enough that clinicians treat it as a diagnostic puzzle with a surprisingly long list of possible answers, ranging from a herniated disc to a kidney stone to conditions far less obvious.
Why the Testicles and Lower Back Share a Pain Signal
The testicles start their existence near the kidneys, at roughly the level of the tenth thoracic vertebra. As they migrate downward during development, they pull their blood vessels, lymphatic channels, and nerves along with them. The sensory fibers from the testicles ultimately enter the spinal cord at the T10 through T12 segments, while additional nerve input comes through the genitofemoral and ilioinguinal nerves in the upper lumbar region.
1PubMed Central. Testicular ptosis as a sign of L2 radiculopathyThis means the testicles share wiring with structures in the retroperitoneum (the space behind your abdominal cavity where the kidneys and aorta sit), the upper lumbar spine, and parts of the pelvis. When any of those structures are irritated, the brain can misread the signal as testicular pain, even though nothing is wrong with the testicle itself. The reverse also happens: a testicular problem can produce aching that radiates into the flank or low back. Doctors call this phenomenon referred pain, and it is the single biggest reason these two symptoms tend to travel together.
Lumbar Disc Disease
A bulging or herniated disc in the lumbar spine is one of the less obvious culprits, and it catches both patients and doctors off guard. Disc problems are strongly associated with sciatica and leg pain, so testicular pain is not the first thing anyone thinks of. But case reports have documented the connection clearly. In one published case, a 23-year-old man had chronic low back pain and testicular pain that persisted for more than three months. Conservative treatment failed, but after the degenerated disc was identified as the pain source through discography and then treated, both the back pain and the testicular pain resolved together.
2PubMed Central. Testicular pain originating from lumbar disc degeneration: A case reportAnother report described a patient with disc protrusions at L1/L2, L3/L4, and L4/L5 who developed chronic testicular pain with no direct testicular cause found on examination. The medical team ultimately attributed the pain to the disc disease after ruling out urological problems.
3PubMed Central. Taming of the Testicular Pain Complicating Lumbar Disc Herniation With Spinal ManipulationA third case involved a 39-year-old who presented with back pain, right-sided testicular pain, and sciatica. Imaging showed disc protrusions at L3/L4 and L4/L5, and after a course of chiropractic treatment over nine weeks, both the back pain and testicular pain improved.
4PubMed Central. Chronic Orchialgia Stemming From Lumbar Disc Herniation: A Case Report and Brief ReviewThe pattern across these cases is consistent: the upper lumbar nerve roots, particularly around L1 and L2, sit close to nerve fibers that serve the testicle. A disc that bulges into that region can irritate those fibers and produce testicular pain as a secondary symptom. If you have nagging testicular discomfort alongside a known back problem, and urological exams keep coming back clean, the spine is worth investigating.
Kidney and Ureteral Stones
Kidney stones are one of the more well-known causes of pain that hits both the flank and the groin or testicle. A stone sitting in the kidney may cause a dull ache in the back, but once it drops into the ureter and starts traveling toward the bladder, the pain pattern changes. The ureter shares sensory innervation with the genitofemoral and ilioinguinal nerves, which is why a stone lodged in the lower ureter can produce sharp, radiating pain into the testicle on the same side.
5PubMed Central. Distal Ureteric Stone Presenting Solely As Testicular Pain: Diagnostic Lessons From a Primary-Care SettingWhat makes this tricky is that the testicular pain can sometimes be the only symptom. One published case described a patient whose ureteric stone presented solely as testicular pain, without the classic flank pain or blood in the urine that doctors typically look for. The lesson from that case, and others like it, is that testicular pain without an obvious testicular cause should prompt consideration of a stone somewhere in the urinary tract. A CT scan or ultrasound can usually settle the question quickly.
Chronic Pelvic Pain and Prostatitis
Chronic prostatitis, sometimes called chronic pelvic pain syndrome, is a frustratingly common condition in younger and middle-aged men that produces pain in the perineum, lower abdomen, and testicles. Back pain is frequently reported too, though a study comparing prostatitis patients to men with other urological conditions found that low back pain on its own did not reliably distinguish prostatitis from other diagnoses. The more characteristic pattern was pain in the perineum, testicles, penis, and during ejaculation.
6PubMed. Chronic pelvic pains represent the most prominent urogenital symptoms of “chronic prostatitis”Part of what makes chronic pelvic pain syndrome so persistent is that the nervous system itself can change. Neuroinflammation and sensitization of sensory nerves lead to a state where the pain threshold drops and pelvic pain perception increases even after the original trigger has resolved.
7PubMed Central. Autonomic Nervous System Dysfunction Is Related to Chronic Prostatitis/Chronic Pelvic Pain SyndromeThis central sensitization effect means that chronic pelvic pain can become self-sustaining. The muscles of the pelvic floor tighten in response to pain, the nerves become more reactive, and the brain keeps interpreting ordinary signals as painful. Men with this condition often bounce between urologists, orthopedists, and pain specialists before anyone identifies the pattern. If testicular and back pain have persisted for months without an obvious structural cause, pelvic floor dysfunction and central sensitization deserve serious consideration.
Myofascial Trigger Points in the Pelvic Floor
Tight, knotted muscles in the pelvic floor can refer pain in patterns that mimic urological or spinal disease. These myofascial trigger points, essentially hyper-irritable spots in muscle tissue, have been shown to produce distant pain when pressed. In one clinical report, treating trigger points in the pelvic floor muscles as well as the gluteus and piriformis muscles improved or resolved symptoms that had been attributed to other conditions.
8PubMed. Interstitial cystitis, pelvic pain, and the relationship to myofascial pain and dysfunction: a report on four patientsA trigger point in the internal obturator or levator ani muscle, for example, can send pain shooting into the testicle, perineum, or low back. The referred pain patterns are predictable and reproducible, which is what makes them useful diagnostically. A physical therapist trained in pelvic floor work can identify and treat these points through manual techniques. This is relevant for people who have had imaging, blood work, and urine tests all come back normal but still have persistent pain in both regions. The muscles themselves are the overlooked piece of the puzzle.
Inguinal Hernia and Post-Surgical Nerve Pain
An inguinal hernia can cause both groin and testicular pain on its own, as the hernia sac presses on nearby nerves. But the more difficult problem comes after hernia repair surgery. Chronic pain following inguinal hernia repair is more common than most people expect. In one large study, roughly one in eight patients reported moderate to severe pain afterward, and the causes fell into distinct categories: nerve damage causing burning or shooting pain, structural problems like a recurrent hernia, and a tender spermatic cord with tightness in the lower abdomen.
9SpringerLink / World Journal of Surgery. Classifying post-herniorrhaphy pain syndromes following elective inguinal hernia repairWhen post-surgical pain centers on the testicle specifically, the genital branch of the genitofemoral nerve is often the culprit. This small nerve runs through the inguinal canal alongside the spermatic cord and can be damaged by surgical mesh, sutures, or scar tissue. In cases where the pain is clearly neuropathic, surgical resection of the damaged nerve segment has been used successfully to relieve symptoms.
10PubMed. Testicular pain after inguinal hernia repair: an approach to resection of the genital branch of genitofemoral nerveIf you developed testicular or lower abdominal pain weeks to months after hernia surgery and it has not faded, it is worth asking your surgeon specifically about nerve entrapment. This is a recognized complication, not a mystery symptom.
Nutcracker Syndrome and Varicocele
A less familiar vascular cause is nutcracker syndrome, where the left renal vein gets compressed between the aorta and the superior mesenteric artery. This compression raises pressure in the left renal vein and can cause blood in the urine, chronic left-sided pelvic pain, and left back pain.
11Radiology Case Reports. Nutcracker syndrome: A rare cause of chronic pelvic pain and left back painIn some cases, the raised venous pressure backs up into the testicular vein, producing a varicocele, which is essentially a cluster of enlarged veins in the scrotum that can cause a dull ache. One case report described a 13-year-old boy with left flank pain and a varicocele found on examination, both ultimately traced to nutcracker syndrome.
12PubMed. Nutcracker Syndrome-A Rare but Important Cause of Varicocele in Adolescent BoysNutcracker syndrome is considered rare and often goes unrecognized, partly because its symptoms overlap with so many other conditions. A left-sided varicocele that does not improve with standard treatment, especially when paired with unexplained back or flank pain, may warrant a closer look at the renal vein with Doppler ultrasound or CT angiography.
Rare but Dangerous Causes
Most of the time, combined testicular and back pain points to something uncomfortable but not immediately life-threatening. There are exceptions. A ruptured abdominal aortic aneurysm can present with testicular pain, mimicking a urological emergency. In one case report, a 74-year-old man arrived at the emergency department with symptoms suggesting urinary tract disease, but autopsy ultimately revealed a ruptured aortic aneurysm.
13PubMed. Abdominal aortic aneurysm rupture presenting as testicular painRetroperitoneal tumors, including testicular cancer that has spread to lymph nodes along the aorta, can also produce both back and testicular symptoms. These are uncommon presentations, but they underline why persistent or worsening pain in both areas, especially when accompanied by sudden onset, lightheadedness, or new swelling, should not be written off as a pulled muscle.
When the Problem Is the Saddle
Cycling puts sustained pressure on the perineum, the strip of tissue between the sit bones where several important nerves pass through. The pudendal nerve is particularly vulnerable. Compression of this nerve during long rides can produce numbness, tingling, or pain in the genitals, and the postural strain of cycling also loads the lumbar spine. A systematic review of pudendal neuropathy in cyclists examined diagnostic methods, preventive strategies, and treatment approaches for this type of nerve damage.
14PubMed Central. Diagnosis, Rehabilitation and Preventive Strategies for Pudendal Neuropathy in Cyclists, A Systematic ReviewThe fix is often mechanical: a properly fitted saddle with a cutout or channel to relieve perineal pressure, periodic standing intervals during rides, and attention to bike geometry that avoids excessive forward lean. If numbness or pain in the testicles coincides with increased cycling volume and you also have new back soreness, the bike setup is the first thing to evaluate before chasing more complex diagnoses.
How Doctors Sort Through the Possibilities
The diagnostic path for combined testicular and back pain usually starts with the most urgent possibilities and works outward. A physical examination of the testicle itself comes first, checking for swelling, masses, tenderness, and signs of torsion (a surgical emergency where the testicle twists on its blood supply, typically producing sudden, severe pain in younger men). Urine tests can flag infection or blood that might suggest a stone. Ultrasound of the scrotum and sometimes the kidneys provides a noninvasive look at the anatomy.
If nothing shows up on those initial tests, the investigation broadens. MRI of the lumbar spine can reveal disc herniations or nerve root compression. If there is suspicion of a vascular problem, Doppler ultrasound or CT with contrast can evaluate the renal veins and aorta. Pelvic floor assessment by a specialized physical therapist is an underused but valuable step, especially when chronic pain has resisted other explanations.
The hardest cases are those where multiple contributing factors overlap. A man with a mild disc bulge, some pelvic floor tension, and a history of stress may have all three feeding into the same pain pattern. Treatment in those situations often requires addressing several layers at once rather than hunting for a single cause.
Epididymitis, Orchitis, and Infections
Infections remain among the most straightforward explanations. Epididymitis, an inflammation of the coiled tube at the back of the testicle, causes localized testicular pain that can be accompanied by a dull ache radiating into the lower abdomen or back. In sexually active younger men, it is often caused by chlamydia or gonorrhea. In older men, urinary tract bacteria are the more common culprits. Orchitis, an infection of the testicle itself, produces similar symptoms and can occur alongside epididymitis.
These infections typically produce additional clues: swelling, redness, warmth over the affected testicle, painful urination, or fever. Antibiotics resolve most cases, and the back component of the pain usually fades as the infection clears. If you have testicular pain with any of those accompanying signs, an infection should be ruled in or out early, because treatment is effective and delay can lead to abscess formation or chronic pain.
Varicocele Without Nutcracker Syndrome
A varicocele, the dilated veins in the scrotum mentioned earlier in the context of nutcracker syndrome, does not always have a vascular compression behind it. Most varicoceles develop on the left side due to the anatomy of the testicular vein and are quite common, affecting a sizeable percentage of men. Many cause no symptoms at all. When they do, the typical complaint is a dull, heavy ache in the testicle that worsens with standing or physical exertion and improves when lying down.
The connection to back pain is indirect but real. Men with a symptomatic varicocele often notice that the aching extends into the groin and lower flank, particularly after a long day on their feet. The pain is not caused by a spinal problem, but it occupies some of the same territory and can create confusion about whether the back or the testicle is the primary problem. Physical examination and a scrotal ultrasound can confirm the diagnosis easily, and treatment ranges from supportive underwear to a minimally invasive procedure to block the dilated veins.
What Warrants an Urgent Visit
Certain combinations of symptoms call for immediate medical attention rather than a wait-and-see approach:
- Sudden, severe testicular pain: especially in a teenager or young adult, this may indicate testicular torsion, which requires surgery within hours to save the testicle.
- Testicular pain with fever and swelling: suggests infection that may need antibiotics promptly.
- New back and testicular pain in an older man with risk factors for vascular disease: aortic aneurysm, though rare as a cause of testicular pain, is a surgical emergency if it ruptures.
- A hard, painless lump in the testicle: even without back pain, this warrants urgent evaluation to rule out testicular cancer.
- Loss of bladder or bowel control alongside back and groin pain: this pattern suggests cauda equina syndrome, a spinal emergency.
For pain that has been building gradually over weeks or months without those red-flag features, a scheduled appointment with your primary care doctor or a urologist is a reasonable starting point. Bring a clear description of where the pain started, whether it is constant or comes and goes, and what makes it better or worse. That history alone narrows the differential substantially and helps your doctor choose the right tests without unnecessary imaging.