Testicle pain during bowel movements usually comes down to shared nerve pathways and the physical forces involved in straining. The testicles and the rectum are neighbors in the pelvis, and they share nerve supply from the same spinal segments. When you bear down to pass a stool, the spike in abdominal pressure, the stretch of rectal tissue, and the contraction of pelvic floor muscles can all irritate or compress structures that feed sensation to the scrotum. The result is a pain that feels testicular but often originates somewhere else entirely.
Shared Nerves and Referred Pain
The pelvis is one of the most densely innervated regions in the body, and many of its organs share wiring. The ilioinguinal nerve, the genitofemoral nerve, and branches of the pudendal nerve all carry signals from overlapping territories that include the lower intestine, the bladder, and the scrotum. When the rectum stretches or the surrounding muscles contract forcefully, those signals can “spill over” into pathways that the brain interprets as testicular pain. This is called referred pain, and it works the same way that a heart attack can produce pain in the left arm: the brain misreads where the signal originated because the nerve highways converge.
This overlap explains why the pain tends to be dull and aching rather than sharp, and why it may linger briefly after you finish on the toilet. It also explains why an ultrasound or physical exam of the testicle itself often comes back normal. The testicle is not the problem; it is just receiving forwarded mail from a neighboring structure.
What Straining Actually Does
When you push to pass a hard stool, you perform what clinicians call a Valsalva maneuver: you close your glottis, tighten your abdominal wall, and bear down. This dramatically raises intra-abdominal pressure, which transmits force downward into the pelvis. That pressure wave acts on everything in its path, including the veins draining the testicles (the pampiniform plexus), the spermatic cord, and the muscles of the pelvic floor. For most people, a brief strain causes no noticeable sensation. But if you are chronically constipated, if your pelvic floor muscles are already tight, or if there is a pre-existing issue like a varicocele or inguinal hernia, that pressure can translate into genuine discomfort in the scrotum.
The effect is amplified by posture. Sitting on a toilet seat puts direct weight on the perineum, the strip of tissue between the anus and the scrotum through which key nerves and blood vessels run. Add forceful straining to that positional compression and you have a recipe for temporary testicular aching that resolves once you stand up and the pressure drops.
Pelvic Floor Dysfunction
One of the most common and least recognized causes of testicular pain linked to bowel movements is a chronically tight pelvic floor. The pelvic floor is a hammock of muscles spanning the base of the pelvis. These muscles support the bladder, rectum, and reproductive organs, and they play a direct role in both continence and defecation. When they become chronically tense or develop trigger points, they can refer pain into the testicles, perineum, or lower abdomen.
A study of men with chronic testicular pain found that 93 percent had at least one symptom pointing toward pelvic floor dysfunction, with problems showing up across urination, bowel function, and sexual function. On electromyography testing, 88 percent of those men had a resting muscle tone in the pelvic floor roughly double what is considered normal.1PubMed Central. Chronic testicular pain as a symptom of pelvic floor dysfunction That chronically elevated tone means the muscles are never fully relaxing. During a bowel movement, when those muscles need to coordinate between contracting and releasing, the already-tight tissue generates pain that radiates into the scrotum.
Pelvic floor dysfunction can develop from a variety of causes: habitual straining from chronic constipation, prolonged sitting (especially cycling), stress and anxiety, pelvic surgery, or simply years of poor toilet posture. Many men who experience this are told their testicles look fine on imaging and are left without answers, because the problem lies in the muscles and nerves surrounding the testicles rather than in the organs themselves.
When Constipation Is the Culprit
Constipation deserves its own mention because it creates a feedback loop. Hard, bulky stool sitting in the rectum puts direct mechanical pressure on nearby structures, including the spermatic cord and the nerves that supply the scrotum. The longer stool sits in the rectum, the more distension occurs, and the more pressure builds against those nerve pathways.
This mechanism has been documented even in children. A case series described six boys who presented with scrotal pain that had no identifiable structural or infectious cause. All of them were constipated, and all of them experienced complete relief of testicular symptoms after the fecal mass was evacuated.2PubMed Central. Constipation as a cause of scrotal pain in children The proposed explanation is either direct neural stimulation from the distended rectum pressing on adjacent nerve fibers, or low-grade inflammation of testicular structures from chronic voiding dysfunction that accompanies constipation.
In adults, the same mechanism applies, though it is often compounded by other factors like diet, sedentary lifestyle, and medication side effects (opioids, certain antidepressants, and iron supplements are common offenders). If your testicular pain during bowel movements tends to be worse when you have not gone in a day or two and better when your stool is soft and easy to pass, constipation is probably playing a central role.
The Pudendal Nerve
The pudendal nerve is the single most important nerve in the perineum. It carries sensation from the genitals, the perineum, and the anal region, and it also controls key muscles involved in urination and defecation. When this nerve becomes compressed or irritated, it can produce pain in any or all of those areas simultaneously.
Pudendal nerve entrapment, sometimes called Alcock canal syndrome, occurs when the nerve is pinched as it passes through a narrow anatomical tunnel in the pelvis. The hallmark feature is perineal, genital, and perianal pain that worsens with sitting.3Europe PMC. Voiding Dysfunction Associated with Pudendal Nerve Entrapment Defecation can aggravate the pain because the straining and the seated posture combine to compress the nerve further. In more severe cases, the entrapment can also cause numbness in the genitals or difficulty with bladder and bowel control.
Pudendal neuralgia is relatively uncommon compared to simple pelvic floor tension, but it is worth knowing about because it requires different treatment. If your pain is specifically triggered or dramatically worsened by sitting (not just by straining), and if it burns or feels electric rather than dull and aching, pudendal nerve involvement is more likely and worth mentioning to a doctor.
Varicoceles and Venous Pressure
A varicocele is an enlargement of the veins inside the scrotum, essentially varicose veins of the testicle. They are found in roughly 15 percent of adult men and are far more common on the left side due to the anatomy of how the left testicular vein drains. Because varicoceles involve sluggish blood flow, anything that increases venous pressure in the pelvis, like straining during a bowel movement, can temporarily worsen the aching, heavy sensation they produce.
It is reasonable to wonder whether chronic constipation might cause varicoceles to form or worsen in the first place. One study looked specifically at this question and found no statistically significant link between chronic constipation and varicocele prevalence. Varicocele rates were slightly higher in the constipated group, but the difference was too small to rule out chance.4Europe PMC. Chronic constipation: facilitator factor for development of varicocele So while straining may aggravate an existing varicocele, constipation does not appear to be a major risk factor for developing one. If you already know you have a varicocele, though, keeping your bowel movements regular and avoiding excessive straining is a practical way to minimize flare-ups.
Post-Surgical Pain
Men who have had surgery in the inguinal or scrotal area sometimes notice testicular pain during bowel movements that was not there before. The most commonly reported culprit is vasectomy. Post-vasectomy pain syndrome can develop weeks to years after the procedure and involves chronic scrotal pain from a variety of proposed mechanisms, including damage to nerves in the spermatic cord, back pressure in the obstructed vas deferens and epididymis, perineural scar tissue formation, or localized inflammation.5Europe PMC. An overview of the management of post-vasectomy pain syndrome
Inguinal hernia repair is another common predecessor. Mesh placed during hernia surgery can occasionally irritate the ilioinguinal or genitofemoral nerves, producing chronic groin and scrotal pain that flares with any increase in intra-abdominal pressure, including coughing, lifting, and straining at stool. If your testicular pain during bowel movements started after a surgical procedure in the groin area, the timing alone is a strong diagnostic clue worth sharing with your surgeon or a pain specialist.
When the Nervous System Overreacts
Sometimes the pain persists even after constipation is treated, pelvic floor muscles are relaxed, and no structural problem can be found. In these cases, the nervous system itself may be part of the problem. Central sensitization is a process in which the brain and spinal cord become hypersensitive to pain signals, amplifying input that would normally be ignored. It is thought to play a role in conditions like irritable bowel syndrome, chronic pelvic pain, fibromyalgia, and chronic headache, all of which share a pattern of persistent pain that exceeds what the local tissue damage would explain.6Europe PMC. Psychosocial factors and central sensitivity syndromes
For men with chronic testicular pain during defecation, this means that the original trigger (tight muscles, constipation, a nerve irritation) may have resolved, but the pain pathways remain turned up. The brain has essentially learned to expect pain with bowel movements and continues producing the sensation even when the physical stimulus is minor. This is not “in your head” in the dismissive sense; it is a well-documented neurological phenomenon. But it does mean that treatment sometimes needs to target the nervous system’s pain processing rather than the pelvis alone, through approaches like cognitive behavioral therapy, graded exposure, or medications that dial down nerve sensitivity.
What Actually Helps
The treatment depends entirely on the cause, but a few approaches cover the most common scenarios:
- Soften your stool: If straining is the trigger, reducing the effort required to defecate is the simplest intervention. More fiber, more water, and if needed, an osmotic laxative can dramatically reduce the intra-abdominal pressure spikes that transmit force to the scrotum.
- Fix your toilet posture: A footstool that raises your knees above your hips mimics a squatting position, which relaxes the puborectalis muscle and straightens the anorectal angle. This means less straining, less pressure, and less pelvic floor tension.
- Pelvic floor physical therapy: For men with chronically tight pelvic floor muscles, specialized physical therapy is one of the more effective treatments available. One study found that after an average of 12 sessions, half of patients experienced meaningful pain improvement, with a median decrease of 4.5 points on a 10-point pain scale. About 13 percent had complete resolution, and almost half were left with only minor residual pain. The proportion of patients needing pain medication dropped significantly after therapy.7PubMed. Physical therapy for chronic scrotal content pain with associated pelvic floor pain on digital rectal exam
- Nerve-targeted treatments: For pudendal nerve entrapment or post-surgical nerve irritation, options range from nerve blocks to physical therapy focused on nerve gliding, and in refractory cases, surgical decompression.
For the small number of men with chronic testicular pain that does not respond to conservative measures, microsurgical spermatic cord denervation is a last-resort procedure that involves cutting the pain-carrying nerves in the spermatic cord while preserving the artery, veins, and vas deferens. Early data from a small series showed complete pain resolution in about three-quarters of patients and partial relief in the rest, with no complications or failures.8PubMed Central. Early experience with microsurgical spermatic cord denervation for chronic orchalgia at a Canadian centre The numbers are promising, but the evidence base is still small, and the procedure is reserved for cases where other treatments have failed.
When You Should Not Wait It Out
Most testicular pain during bowel movements is benign and related to the mechanisms above. But certain features signal something that needs urgent attention:
- Sudden, severe pain: Testicular torsion, where the testicle twists on its blood supply, is a surgical emergency. It typically strikes suddenly and is not relieved by changing position or completing a bowel movement. If severe pain comes on rapidly, especially in a teenager or young adult, go to the emergency room.
- Swelling, redness, or fever: These suggest infection, either epididymitis or orchitis. Infections need antibiotics, and delay can lead to abscess formation.
- A lump or hardness in the testicle: Testicular cancer rarely causes pain, but when it does, it tends to be a persistent dull ache rather than something linked specifically to bowel movements. Any new lump or change in testicular texture warrants an ultrasound.
- Pain that is getting worse over weeks: Chronic testicular pain that escalates despite simple measures like softening your stool and avoiding straining deserves medical evaluation. Pelvic floor dysfunction, pudendal neuralgia, and post-surgical nerve problems all benefit from early intervention.
If your pain is mild, comes and goes with straining, and resolves quickly, it is almost certainly one of the referred-pain or pressure-related mechanisms described above. Addressing constipation and reducing straining will resolve the majority of cases without any further workup.
Why This Gets Missed
One reason men often go months or years without answers is that the connection between bowel function and testicular pain falls between specialties. Urologists think about the testicle. Gastroenterologists think about the bowel. Neither is necessarily trained to think about the pelvic floor as the shared territory between the two. The result is that men get a scrotal ultrasound (normal), maybe a urine culture (negative), and a shrug. Meanwhile, a rectal exam that assessed pelvic floor tone, a dietary history that identified chronic constipation, or a referral for pelvic floor physical therapy could have pointed to the answer much sooner.
Pelvic floor physical therapy in particular has grown substantially in availability over the past decade, largely driven by women’s health research. Many men do not realize it is also available for them, or that it is relevant to scrotal pain. If you have been told your testicles are structurally normal but the pain persists, asking specifically about pelvic floor assessment is a reasonable next step that many general practitioners will not think to suggest on their own.