Tinea Versicolour is a fungal infection of the skin. It's also called pityriasis versicolor and it is caused by a type of yeast that naturally lives on the skin. When the yeast grows out of control, the skin disease, Tinea Versicolour which appears as a rash, is the result.
Causes
The infection can happen due to any of the following reasons:
1. An oily skin
2. Living in hot climatic area
3. Excessive sweating
4. Weak immune system
Because the yeast grows naturally on the skin, tinea versicolor is not contagious. The condition can affect anyone regardless of their skin color. However, it is known to be common in teens and young adults.
Signs and Symptoms of Tinea Versicolor
Acidic bleach from the growing yeast causes areas of skin to be of different color to the skin around them. These can be individual spots or patches. Specific signs and symptoms of the infection include:
• Patches that may be white, black, red, or brown and can be lighter or darker than the skin around them.
• Spots that do not tan the way the rest of your skin does.
• Spots that may occur anywhere on your body but are most commonly seen on your neck, chest, back, and arms.
source
https://onelifedoc.blogspot.com.ng/2018/05/tinea-versicolour.html