Testicle Size Asymmetry: Normal Variation vs. Medical Concern

It is normal for one testicle to be slightly larger or hang lower than the other. Typically, the left testis is larger and lower.

When to Seek Medical Evaluation

• Sudden change in size, shape, or consistency
• Painless lump (testicular cancer — most common cancer in males 15–35)
• Pain, heaviness, ache (torsion, epididymitis, orchitis)
• Swelling (hydrocele, varicocele, hernia)
• Hardness or fixation to surrounding tissue

Self-Exam Recommendation

• Monthly, after warm shower (scrotum relaxed)
• Gently roll each testis between thumb and fingers
• Feel for smooth, firm, oval shape; epididymis as soft rope-like structure posteriorly

Red Flags = Urgent Urology Referral

• Acute severe testicular pain → torsion (surgical emergency, <6h window)
• Painless mass → ultrasound + tumor markers (AFP, β-hCG, LDH)

Most asymmetry is benign. Any change warrants evaluation.