Swollen Testicles
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Reviewed By:
Jason Chandrapal, MD (Urology)
Dr Chandrapal received his MD degree from Texas Tech Health Science Center School of Medicine. After graduation he did a research fellowship with the University of Utah Division of Urology, followed by 4 years of urology residency at Duke University. In 2020 he began a 2 year tenure as an Interprofessional Advanced Clinical Simulation Fellow at the Durham VA in Durham, NC where he created and implemented clinical simulations with an emphasis on emotional intelligence. Additionally he has experience with medical writing and consultation for Buoy Health.
Nao Saito, MD (Urology)
After graduating from Tokyo Women's Medical University School of Medicine, Dr. Saito worked at Tokyo Women's Medical University Hospital, Toda Chuo General Hospital, Tokyo Women's Medical University Yachiyo Medical Center, and Ako Chuo Hospital before becoming Deputy Director (current position) at Takasaki Tower Clinic Department of Ophthalmology and Urology in April 2020.
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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 Jan 4, 2023
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?
Other Related Symptoms
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Symptoms from the same body system / part
Symptoms treated by the same specialty
Reviewed By:
Jason Chandrapal, MD (Urology)
Dr Chandrapal received his MD degree from Texas Tech Health Science Center School of Medicine. After graduation he did a research fellowship with the University of Utah Division of Urology, followed by 4 years of urology residency at Duke University. In 2020 he began a 2 year tenure as an Interprofessional Advanced Clinical Simulation Fellow at the Durham VA in Durham, NC where he created and implemented clinical simulations with an emphasis on emotional intelligence. Additionally he has experience with medical writing and consultation for Buoy Health.
Nao Saito, MD (Urology)
After graduating from Tokyo Women's Medical University School of Medicine, Dr. Saito worked at Tokyo Women's Medical University Hospital, Toda Chuo General Hospital, Tokyo Women's Medical University Yachiyo Medical Center, and Ako Chuo Hospital before becoming Deputy Director (current position) at Takasaki Tower Clinic Department of Ophthalmology and Urology in April 2020.
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Seiji Kanazawa, MD, PHD
Obstetrics and gynecology (OBGYN)
National Center for Child Health and Development, Japan