In which skin type would you expect to see an orange fluorescence under a Wood's lamp?

Under a Wood's lamp, orange fluorescence typically indicates the presence of certain conditions that are more prevalent in oily and acne-prone skin. This fluorescence is often associated with the production of porphyrins, which are compounds produced by bacteria that thrive in an oily environment. In individuals with oily or acne-prone skin, the excess sebum provides an ideal breeding ground for these bacteria, leading to the presence of porphyrins that fluoresce orange when exposed to the ultraviolet light of the Wood's lamp.

This characteristic can help skincare professionals identify and differentiate skin types and conditions during assessments, allowing for more targeted treatment options. Other skin types, such as normal, dry, or dehydrated skin, typically do not exhibit the same orange fluorescence, making the identification of oily and acne-prone skin through this method particularly valuable in clinical practice.