Different Colored Eyebrows (Eyebrow Heterochromia): Causes & Significance

Eyebrow Color Heterochromia: Uneven Melanin Distribution

Having two differently colored eyebrows results from asymmetric melanin deposition in hair follicles. Usually benign.

Common Causes

• Genetics / mosaicism: Somatic mutation in melanocyte lineage during development.
• Localized trauma / scarring: Prior injury, surgery, burns, radiation alters follicle pigmentation.
• Medical conditions: Vitiligo (loss), piebaldism, Waardenburg syndrome, neurofibromatosis type 1.
• Inflammatory: Alopecia areata regrowth often white.
• Medications: Topical prostaglandin analogs (latisse/bimatoprost) can darken; chemo can cause whitening.
• Aging: Asymmetric graying.

When to Evaluate

• Sudden onset with other symptoms (vision change, hearing loss, skin patches).
• Associated with systemic syndrome features.
• Cosmetic concern – dermatologist can assess for treatable causes.

Management

• Most require no treatment.
• Cosmetic options: brow tinting, microblading, makeup.
• Address underlying condition if identified.

Isolated eyebrow color difference is typically a harmless variation.