With any skin condition, it's a good idea to see your primary care doctor or a dermatologist for an examination and diagnosis. White or light-brown patches of flaky skin that appear on the trunk or neck may indicate a common skin condition called tinea versicolor. It is caused by a fungus, and is frequently seen in young adults. Treatment includes using an antifungal cream or dandruff shampoo. The patches may stay several months after the fungus is gone.
Relapses are common.
Another treatment choice is an antifungal pill. Check the calendar.