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 do I know if white patches on my feet are caused by vitiligo?
- Q What is vitiligo?
- Q How do I know if white patches on my lips are caused by vitiligo?
- Q How does vitiligo progress?
- Q How does emotional stress affect vitiligo?
- Q What happens to your skin when you get vitiligo?