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What causes painful or swollen testicles?

ANSWER

Many things can cause painful or swollen testicles, including:

  • Hydrocele (fluid in an area surrounding a testicle)
  • Infection, such as from a sexually transmitted disease (STD)
  • Inguinal hernia
  • Injury to the testicles
  • Varicocele (swelling in a vein that drains blood away from a testicle)
  • Testicular cancer
  • Testicular torsion (testicle gets twisted)

SOURCES:

Nemours Foundation: "Male Reproductive System."

Nemours Foundation: "Is It Normal for One Testicle to Be Bigger?"

American Academy of Pediatrics: "Physical Development in Boys: What to Expect."

American Academy of Pediatrics: "Boys' Secondary Sex Characteristics."

Great Ormond Street Hospital: "Hanging Testicles."

American Cancer Society: "Do I Have Testicular Cancer?"

Reviewed by Dan Brennan on October 15, 2019

SOURCES:

Nemours Foundation: "Male Reproductive System."

Nemours Foundation: "Is It Normal for One Testicle to Be Bigger?"

American Academy of Pediatrics: "Physical Development in Boys: What to Expect."

American Academy of Pediatrics: "Boys' Secondary Sex Characteristics."

Great Ormond Street Hospital: "Hanging Testicles."

American Cancer Society: "Do I Have Testicular Cancer?"

Reviewed by Dan Brennan on October 15, 2019

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When should I see a doctor about painful or swollen testicles?

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