Left Testicle Itch: Common Causes and When to See a Doctor

Unilateral testicular itch has no special significance. Common causes:

• Hygiene (infrequent washing, tight synthetic underwear)
• Skin conditions (eczema, tinea cruris/jock itch, psoriasis)
• Contact allergy (detergents, soaps, fabric softeners)
• Infections (fungal, bacterial, STIs)
• Dry skin (cold weather)
• Pubic lice
• Stress/anxiety (psychogenic pruritus)
• Systemic disease (rare: diabetes, liver/kidney disease)

If itching persists >2 weeks, or accompanies pain, swelling, discharge, fever, or skin changes, see a clinician for exam and targeted treatment.