Yeast on the skin causes tinea versicolor, which is a common fungal skin infection. It results in discolored patches on the skin, often found on the chest or back. Discolored skin patches can range in color from dark brown, white to light brown, gray-black, or pinkish red.

What’s behind your blotchy skin? This WebMD slide show will show you some of the things that can cause it.

What is a chest rash? A rash is a symptom that causes the affected area of skin to become discolored, blotchy, and swollen. It may also cause spots that are bumpy, scaly, flaky, or filled with pus. Rashes can vary in location, pattern, and extent.

A rash on the chest can a symptom of a chronic skin condition, specific infections or reaction from medication. Learn more about causes, treatment or remedy for skin rashes.

Bright red spots on the skin can be due to cherry angiomas (also called red moles). These are non-cancerous lesions that consist of proliferating small blood vessels. Cherry angiomas can occur anywhere but are common on the chest, back, and arms. They are usually seen after the ages of 30 to 40s.