Testicular pain has a wide range of causes, from minor issues that resolve on their own to emergencies that need surgery within hours. The pain can start in the testicles themselves or be referred from somewhere else entirely, like a kidney stone or a hernia. Understanding the type of pain you’re experiencing, how fast it came on, and what other symptoms you have helps narrow down what’s going on.
Testicular Torsion: The Emergency to Rule Out First
If your pain came on suddenly and severely, testicular torsion is the first thing to consider. This happens when a testicle rotates on its spermatic cord, cutting off its own blood supply. The affected testicle may sit noticeably higher than the other one, and the pain is typically intense enough that you can’t ignore it. Nausea and vomiting are common alongside the pain.
Time matters enormously here. There is typically a four to eight hour window before permanent damage sets in. When surgery happens within six hours, the testicle is saved 90% to 100% of the time. After 12 hours, the salvage rate drops to around 50%. Beyond 24 hours, it falls below 10%. If you have sudden, severe pain in one testicle, especially with swelling or a testicle that looks out of position, go to the emergency room immediately. This is one of the few situations in medicine where a few hours can mean the difference between keeping and losing an organ.
Torsion is most common in boys and young men between ages 12 and 18, but it can happen at any age.
Infections: Epididymitis and Orchitis
Infection is one of the most common causes of testicular pain in adults. Epididymitis, an infection of the coiled tube behind each testicle, typically causes pain that builds gradually over days rather than striking all at once. You may notice swelling, warmth, or redness on one side of the scrotum, and sometimes a fever or burning during urination.
The bacteria responsible depend largely on your age and sexual activity. In sexually active men under 35, the infection is often caused by the same organisms behind chlamydia or gonorrhea. In older men, it’s more commonly linked to urinary tract bacteria, particularly in those with prostate enlargement or other bladder outlet issues. Either way, antibiotics typically clear the infection, though the soreness can linger for weeks after treatment.
Orchitis, infection of the testicle itself, is less common and is classically associated with the mumps virus. It can also develop as a complication of untreated epididymitis. The pain and swelling tend to be more diffuse, affecting the entire testicle rather than just the back of it.
Varicoceles: A Dull, Persistent Ache
A varicocele is an enlargement of the veins inside the scrotum, similar to varicose veins in the legs. They affect roughly 15% of men and are far more common on the left side. The pain is usually a dull ache or heaviness that worsens after standing for long periods, exercising, or spending time in hot weather. Lying down often brings relief.
Varicoceles are graded on a three-point scale. Grade I varicoceles can only be felt when you bear down or strain. Grade II can be felt at rest but aren’t visible. Grade III are large enough to see through the skin. Many varicoceles cause no pain at all and are discovered incidentally. The main concern beyond discomfort is their potential impact on fertility: varicoceles can impair sperm production and, in some cases, affect hormone levels. If yours is painful or you’re concerned about fertility, a urologist can discuss whether treatment makes sense.
Inguinal Hernias
An inguinal hernia occurs when tissue, usually part of the intestinal lining or intestine itself, pushes through a weak spot in the lower abdominal wall near the inguinal canal. In men, this canal is the pathway the spermatic cord takes into the scrotum, which makes it a natural weak point. Large hernias can extend all the way down into the scrotum, causing pain and visible swelling alongside the testicle.
The pain from a hernia tends to be a burning or aching sensation near the groin that gets worse with bending, coughing, or lifting. You may notice a bulge that appears when you stand and disappears when you lie down. While not all hernias are emergencies, a hernia that becomes trapped (incarcerated) and can’t be pushed back in causes severe pain and needs urgent surgical attention.
Referred Pain From Kidney Stones
Sometimes testicular pain doesn’t originate in the testicles at all. Kidney stones are a common culprit. As a stone moves through the ureter (the tube connecting your kidney to your bladder), it can trigger pain that radiates down into the scrotum. This happens because the nerves running alongside the ureter travel close to the spermatic cord before entering the groin, so the brain can misinterpret where the pain signal is coming from.
If your testicular pain is accompanied by flank or lower back pain, blood in your urine, or pain that comes in intense waves, a kidney stone is worth considering. The testicle itself will look and feel normal on examination, which helps distinguish this from problems within the scrotum.
Trauma and Physical Injury
A direct blow to the testicles causes immediate, intense pain that most men are familiar with. In most cases, the pain fades within an hour and no lasting damage occurs. The concern is when pain persists, swelling develops, or the scrotum becomes bruised or discolored. These signs can indicate a more serious injury like a testicular rupture, where the tough outer covering of the testicle tears.
Ultrasound is the go-to imaging tool after scrotal trauma because it can reliably show whether that outer layer is intact and whether blood flow to the testicle is normal. When a rupture is confirmed, surgery to repair the damage and remove any non-viable tissue can often save part or all of the testicle. The sooner this happens, the better the outcome.
Chronic Testicular Pain
Pain that persists for more than three months and interferes with daily activities is classified as chronic scrotal content pain. This is more common than many men realize, and it can be one of the more frustrating conditions to deal with because a clear cause isn’t always found. Possible contributors include prior infections, past vasectomy, nerve irritation, pelvic floor muscle tension, or a small varicocele that’s not obviously visible.
Treatment usually starts conservatively with anti-inflammatory medications, scrotal support, and sometimes pelvic floor physical therapy. Nerve blocks can help both diagnose the source of pain and provide relief. For men whose chronic pain has a clear structural cause, like a varicocele or spermatic cord issue, surgery may be an option when other approaches haven’t worked. The path to relief often involves some trial and error, but most men do find a management strategy that significantly reduces their symptoms.
What the Type of Pain Tells You
Paying attention to how the pain behaves gives useful clues about its cause:
- Sudden and severe: Torsion or trauma. Both warrant an immediate ER visit.
- Gradual onset with swelling or fever: Likely an infection like epididymitis.
- Dull ache that worsens with standing: Varicocele.
- Pain with a visible groin bulge: Inguinal hernia.
- Testicular pain with back or flank pain: Possible kidney stone.
- Low-grade pain lasting months: Chronic scrotal pain, which needs a urological workup.
Any testicular pain that doesn’t resolve within an hour or two, or that comes with swelling, discoloration, fever, or nausea, is worth getting checked. For sudden, severe pain, don’t wait. The six-hour window for torsion is unforgiving, and it’s always better to have a false alarm than a missed one.