Testicle pain/swelling is discomfort in one or both testicles. The pain sometimes radiates to the lower abdomen.

Most common causes of testicular pain include:
- Trauma or injury
- Testicular torsion
- Epididymitis
- Orchitis
- Prostatitis
- Hernia
- Varicocele
- Testicular tumor
- Epididymal cyst
- Hydrocele
- Kidney stones

Call your health care provider immediately or go to an emergency room if:
- Your pain is severe or sudden
- You have had an injury or trauma to the scrotum, and you still have pain or swelling after one hour
- Your pain is accompanied by nausea or vomiting

Also call your health care provider right away if:
- You feel a lump in the scrotum
- You have a fever
- Your scrotum is warm, tender to the touch, or red
- You have been in contact with someone who has the mumps