
Six health factors that can shrink a man's testicles—and what to watch for
Six health issues linked to smaller testicles include testosterone suppression from TRT or anabolic steroids, testicular torsion (a medical emergency), varicocele causing increased scrotal temperature, infections such as orchitis, hypogonadism, and natural aging. Seek medical evaluation if shrinkage occurs with pain, swelling, a lump, or other new symptoms, typically via physical exam, ultrasound, and hormone tests.




