If vitiligo is suspected, your doctor may shine a special light called a Wood's lamp on your skin to see if the patches have little or no pigment. People with vitiligo have no pigment, so patches appear yellow-green or blue under the light. Since vitiligo is thought to be an autoimmune disease, a blood test might also be performed to measure immune-system chemicals that typically increase with autoimmune diseases. A sample of skin (biopsy) may be sent to a lab to measure melanocytes.
- Q How does vitiligo affect dark and light-skinned people?
- Q How do I know if white patches on my lips are caused by vitiligo?
- Q How do I know if white patches on my nostrils are caused by vitiligo?
- Q What role does sun exposure play in vitiligo?
- Q How does sun exposure affect vitiligo?
- Q Is vitiligo being studied in clinical trials?