Health Library

The Health Library is a collection of health and wellness resources created for learning and accessibility. Select a topic below for related health information or search for a topic in the search bar for more information on other medical conditions.

Spanish Translation

Top of the page

Wood's light examination

A Wood's light examination is done to determine if a skin condition is caused by a fungal infection. When this special light is directed toward the skin, certain types of fungi cause the skin to glow or fluoresce (for example, it may look bluish green under the light).

A Wood's light can also be used with a special stain to detect eye injuries, and in sexual assault exams to detect semen on skin or clothing.

Current as of: May 1, 2026

Author: WebMD Ignite Staff

Clinical Review Board
All WebMD Ignite education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.

This information does not replace the advice of a doctor. WebMD Ignite, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.