Testicular tenderness has a wide range of causes, from minor issues that resolve on their own to conditions that need prompt treatment. Most of the time, tenderness without other symptoms points to something manageable like inflammation, a small fluid-filled cyst, or even referred pain from somewhere else in your body. But sudden, severe pain is a different situation entirely and needs emergency attention.
Infection and Inflammation
The most common cause of testicular tenderness in younger and middle-aged adults is epididymitis, an inflammation of the coiled tube that sits behind each testicle and carries sperm. It typically causes pain on one side, along with swelling you can feel at the back of the testicle. The swelling usually starts at the lower end of the epididymis and can spread upward into the testicle itself. The cord running up from the testicle into the groin often feels tender and swollen too.
In sexually active people under 35, epididymitis is most often caused by the same bacteria responsible for chlamydia or gonorrhea. In older adults, it’s more commonly linked to urinary tract bacteria, especially when there’s difficulty fully emptying the bladder. Either way, it’s treatable with antibiotics, and the tenderness usually starts improving within a few days of starting treatment, though full resolution can take weeks.
Orchitis, a related condition where the testicle itself becomes inflamed, can develop alongside epididymitis or on its own. Viral infections, including mumps, are a well-known trigger. Orchitis tends to cause more diffuse, whole-testicle soreness rather than tenderness localized to one spot.
Varicoceles and Fluid-Filled Cysts
A varicocele is an enlargement of the veins inside the scrotum, similar to varicose veins in the legs. It produces a dull, aching tenderness that’s worse when you’ve been standing for a long time and tends to ease when you lie down. Larger varicoceles can feel like a “bag of worms” above the testicle. Smaller ones aren’t visible but can be felt with your fingers. The affected testicle may also be noticeably smaller than the other one. Varicoceles are very common and often don’t require treatment unless they’re causing significant pain or affecting fertility.
A spermatocele is a fluid-filled sac that forms near the top of the testicle. These are generally painless, but larger ones can create a sensation of heaviness or mild tenderness. A hydrocele, which is fluid collecting around the testicle rather than in a discrete sac, can cause similar symptoms. Both are usually benign.
Pain That Isn’t Coming From the Testicle
Your testicles share nerve pathways with several other structures in your abdomen and pelvis, which means problems elsewhere can show up as scrotal tenderness. Kidney stones passing through the ureter are a classic example. So are inguinal hernias, where tissue pushes through a weak spot in the groin wall. Hip problems can also refer pain to the scrotal area.
If your tenderness doesn’t match up with any visible swelling or changes in the testicle itself, referred pain is worth considering. The clue is often that pressing directly on the testicle doesn’t make it worse, or the pain seems to radiate from your back, side, or groin rather than originating in the scrotum.
Chronic Tenderness Without a Clear Cause
Some people experience testicular tenderness that lingers for weeks or months without an obvious infection or structural problem. This can be frustrating to diagnose. One underrecognized cause is overactivity in the pelvic floor muscles, the group of muscles that support your bladder and bowel. In one study of men with chronic testicular pain, 88% had pelvic floor muscle tension roughly double the normal resting level. These patients also commonly reported urinary issues, bowel problems, or sexual dysfunction alongside the scrotal tenderness.
Nerve entrapment is another possibility. The nerves running through the inguinal canal in your groin can become irritated or compressed, especially after surgery in the area (hernia repair is a common culprit) or from repetitive strain. Previous vasectomy can also lead to lingering tenderness in some cases. Pelvic floor physical therapy, nerve blocks, or other targeted treatments can help when the cause is muscular or nerve-related.
Testicular Torsion: The Emergency
Testicular torsion happens when the spermatic cord twists, cutting off blood flow to the testicle. It causes sudden, severe pain, often accompanied by nausea or vomiting. This is the one cause of testicular tenderness you cannot wait out.
The survival rate of the testicle drops sharply with time. Within the first six hours, 97% of testicles can be saved surgically. Between 7 and 12 hours, that drops to 79%. By 13 to 18 hours, it’s 57%. After 24 hours, fewer than half survive. Torsion is most common in adolescents and young adults, but it can happen at any age. If your pain came on suddenly and intensely, especially if the testicle seems to be sitting higher than usual or at an odd angle, go to the emergency room immediately.
How to Check Yourself
A regular self-exam helps you learn what’s normal for your body so you can spot changes early. The best time is during or right after a warm shower, when the scrotal skin is relaxed. Stand in front of a mirror and hold your penis out of the way so you can see the scrotum clearly. Look for any visible swelling or asymmetry.
Then examine each testicle individually. Place your index and middle fingers underneath and your thumbs on top, then gently roll the testicle between them. You’re feeling for hard lumps, smooth rounded bumps, or any change in size, shape, or firmness compared to what you’ve felt before. You’ll notice a soft, rope-like structure along the back of each testicle. That’s the epididymis, and it’s completely normal. Bumps on the skin of the scrotum are usually ingrown hairs or minor skin irritation, not something deeper.
Symptoms That Need Immediate Attention
Most testicular tenderness can wait for a scheduled doctor’s visit, but certain combinations of symptoms change the urgency. Seek emergency care if you have sudden, severe pain in one testicle, or if your tenderness comes with nausea, fever, chills, or blood in your urine. These patterns can indicate torsion, a serious infection spreading beyond the epididymis, or other conditions where hours matter.
Tenderness that’s mild, comes and goes, or has been slowly building over days to weeks is less likely to be an emergency, but it still warrants a visit to your doctor. An ultrasound can quickly rule out torsion and identify structural causes like varicoceles, cysts, or fluid collections. Urine tests can check for infection. In most cases, getting a clear answer is straightforward and leads to effective treatment.