Swollen Testicles

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Medically Reviewed By:

Jason Chandrapal

Jason Chandrapal, MD


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People with these symptoms also use Ubie's symptom checker to find possible causes

  • One side of the scrotum swollen

  • My testicles are getting bigger

  • "Balls" are swelling and the color looks different

  • My scrotum is getting bigger

  • Scrotum is turning dark red and getting swollen

  • The scrotum is swollen

  • Scrotum is changing color and getting swollen

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Content updated on Sep 6, 2022

About the symptom

Enlargement of the scrotum, the sac below the penis, or the testicles, the two organs within the scrotum. Pain due to swelling in this area can range from just feeling uncomfortable to unbearable. There are many causes for scrotal and testicular swelling such as an infection or enlarging fluid filled sac within the scrotum known as a hydrocele. The most serious cause of swelling is testicular torsion, when the testicle twists and stops the blood supply to itself. This is associated with extreme testicular pain, swelling, as well as nausea and vomiting. If you experience these symptoms, you should seek immediate medical attention as delaying treatment may risk in losing the testicle.

When to see a doctor

Seek professional care if you experience any of the following symptoms

  • Swollen scrotum or testicles

Possible causes

  • Varicocele

    A varicocele is a condition where the veins in your scrotum become enlarged. The exaxt cause is unknown, but experts believe that it may be due to defective valves in the veins within your scrotum. The valves regulate the flow of blood to and from the testicles. It may occur from compression of a vein by a nearby structures as well. Varicoceles may lead to decreased sperm production and quality.

  • Hydrocele

    A swelling of the scrotum caused by fluid collecting in the space around a testicle. It is common in newborns, in older boys and men, can be caused due to inflammation or injury.

  • Testicular tumor

    A testicular tumor is a lump or swelling on either testicle. The tumour may be benign, which doesn't spread to other parts of the body, or malignant, commonly known as cancerous, which means it can spread to other parts of the body. Testicular cancer is usually first seen as a pea-sized hard lump but it can grow much larger. Pain, discomfort or numbness in the affected testicle might be present.

Related serious diseases

  • Epididymitis

    Epididymitis is the swelling and inflammation of your epididymis, a tube at the back of the testicle that carries your sperm. Epididymitis is most commonly caused by bacterial infections, including sexually-transmitted infections such as chlamydia and gonorrhea.

  • Testicular torsion

Questions your doctor may ask about this symptom

Your doctor may ask these questions to check for this symptom

  • Do you have swelling of the testicles or scrotum?

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Medically Reviewed By:

From our team of 50+ doctors

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Developed by doctors.

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