Woods Lamp Tinea Versicolor. The dermatologist will hold the wood's lamp about 4 or 5 inches from the affected skin. Scrape off a bit of the skin.
![Wood's lamp by aseem](https://i2.wp.com/image.slidesharecdn.com/woodslampbyaseem-131229150723-phpapp02/95/woods-lamp-by-aseem-15-638.jpg?cb=1388329690)
The dermatologist will hold the wood's lamp about 4 or 5 inches from the affected skin. This will be examined under a microscope. Look at the skin with a special device called a wood's lamp.