Differential Diagnosis for Dull Aching Testicle Pain while Laying Down

• Single Most Likely Diagnosis
  • Varicocele: This condition, characterized by an enlargement of the veins within the scrotum, can cause a dull aching pain in the testicle, especially when lying down due to increased venous pressure.
• Other Likely Diagnoses
  • Epididymitis: Inflammation of the epididymis, often due to infection, can cause testicular pain that may worsen with certain positions, including lying down.
  • Orchitis: Inflammation of one or both testicles, usually caused by bacterial or viral infections, can lead to dull aching pain, which might be exacerbated by position changes.
  • Hydrocele: Accumulation of fluid around a testicle can cause discomfort or pain, especially when lying down, due to the increased pressure on the testicle.
• Do Not Miss Diagnoses
  • Testicular Torsion: Although typically presenting with sudden, severe pain, testicular torsion is a medical emergency that requires immediate attention. It's less likely to present as dull aching pain but must be considered due to its potential for severe consequences if missed.
  • Testicular Cancer: While less common, testicular cancer can cause aching pain in the testicle and is crucial to diagnose early for effective treatment.
• Rare Diagnoses
  • Spermatocele: A cystic structure filled with sperm that arises from the head of the epididymis can cause discomfort or pain, especially if large enough to exert pressure on the testicle.
  • Cystic Dysplasia of the Testis: A rare congenital anomaly that can cause testicular enlargement and pain due to cystic changes within the testis.