Sore testicles usually result from something minor and treatable, like a mild strain, inflammation, or infection. But because the testicles share nerve pathways with the abdomen and groin, the source of the pain isn’t always obvious. The cause matters, because some conditions need quick treatment while others resolve on their own with basic care at home.
Infection and Inflammation
One of the most common causes of testicular soreness is epididymitis, an inflammation of the coiled tube that sits behind each testicle and carries sperm. It typically affects one side, comes on gradually over a day or two, and often brings swelling, warmth, or redness in the scrotum. You might also notice pain when urinating or a discharge from the penis.
In sexually active men between 14 and 35, the usual culprits are chlamydia and gonorrhea. In older men, it’s more often tied to urinary tract infections or prostate issues. Sometimes the inflammation spreads to the testicle itself, a combination called epididymo-orchitis. Infections are treated with antibiotics, and most people feel significantly better within a few days of starting them, though full recovery can take a couple of weeks.
Varicocele
A varicocele is an enlargement of the veins inside the scrotum, similar to varicose veins in the leg. It affects roughly 15% of men and usually develops on the left side. The soreness tends to be a dull, aching heaviness that worsens after standing for long periods or physical activity and eases when you lie down. Many varicoceles cause no symptoms at all and are discovered incidentally. When they do cause discomfort, supportive underwear and over-the-counter anti-inflammatories are usually enough. Treatment is only considered if the pain is persistent or if fertility is a concern.
Inguinal Hernia
A hernia in the groin can cause testicular soreness even though the problem isn’t in the testicle itself. The inguinal canal, which the spermatic cord passes through on its way to the scrotum, is a natural weak point in the abdominal wall. When tissue pushes through that gap, it can press on surrounding nerves or even extend down into the scrotum. The telltale sign is a bulge in the groin that becomes more noticeable when you cough, strain, or stand up. Large hernias can cause visible scrotal swelling along with the pain.
Trauma and Minor Strain
A direct hit, awkward movement, or even prolonged cycling can leave the testicles sore for hours or days. Minor trauma is one of the most common reasons for short-lived scrotal pain, and it usually resolves with simple home care: wrap an ice pack in a cloth and apply it to the area for 15 to 20 minutes at a time, take an over-the-counter anti-inflammatory like ibuprofen, and reduce physical activity. Wearing snug, supportive underwear or a jockstrap helps limit movement that aggravates the pain. When you’re lying down, placing a small rolled towel under the scrotum can also provide relief.
Chronic Scrotal Pain
If testicular soreness has been coming and going (or never fully leaving) for three months or longer, it falls into a category called chronic scrotal content pain. This is more common than many people realize, and it can be frustrating because a clear cause isn’t always found.
The American Urological Association’s 2025 guidelines recommend a nonsurgical, multimodal approach as the starting point. That typically means a combination of lifestyle changes (dietary adjustments, regular aerobic exercise), pain management with anti-inflammatories or nerve-calming medications, and physical therapy focused on the pelvic floor muscles. Cognitive behavioral therapy and acupuncture are also listed as options with some evidence behind them. The key takeaway is that chronic testicular pain rarely has a single fix. It responds best to a combination of strategies tailored over time.
Testicular Cancer
Most testicular cancers present as a painless lump or swelling rather than soreness. Some tumors do cause pain, but this is less common. If you feel a firm, pea-sized or larger lump on the testicle itself (not the softer structures behind it), that warrants a medical evaluation regardless of whether it hurts. Testicular cancer is highly treatable when caught early, and an ultrasound can usually distinguish a tumor from a benign cyst or fluid collection quickly.
Testicular Torsion: The Emergency
Torsion happens when the spermatic cord twists, cutting off blood supply to the testicle. It causes sudden, severe pain, often accompanied by nausea or vomiting. The affected testicle may sit higher than usual or at an odd angle. This is a surgical emergency. Salvage rates are 90% to 100% if surgery happens within six hours, drop to about 50% after 12 hours, and fall below 10% after 24 hours. If pain comes on abruptly and intensely, go to the emergency room immediately.
Other Red Flags That Need Urgent Care
Beyond torsion, a few other scenarios call for an ER visit rather than a wait-and-see approach:
- A groin or scrotal mass that can’t be pushed back in, with severe pain, vomiting, or constipation. This suggests an incarcerated hernia, where trapped tissue loses its blood supply.
- Redness spreading across the scrotum or perineum, especially with skin that looks blistered, darkened, or necrotic. This can signal a rapidly progressing soft-tissue infection.
- Sudden scrotal pain with dizziness, confusion, or a weak pulse, which in rare cases points to a vascular emergency higher in the abdomen.
What Happens at the Doctor’s Visit
For non-emergency soreness, a doctor will typically start with a physical exam of the scrotum and groin, a urine test, and questions about when the pain started, what makes it worse, and whether you have urinary or sexual symptoms. If the picture isn’t clear from the exam alone, a Doppler ultrasound is the standard next step. This painless imaging test measures blood flow to the testicle and can identify torsion (reduced flow), infection (increased flow), fluid collections, hernias, and masses in a single scan.
In cases where chronic pain is suspected, the workup may expand to include pelvic floor muscle assessment and screening for overlapping conditions like prostatitis or bladder issues. Validated questionnaires are sometimes used to track pain levels and quality of life over time, which helps guide treatment adjustments.