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U.S. health officials are reporting that half of adults under 30 say they have had a sunburn at least once in the past year.
Experts worry it's a sign young people aren't paying attention to the warnings about skin cancer.
The rate of sunburn is about the same as it was 10 years earlier, reversing progress reported just five years ago.
The Centers for Disease Control and Prevention released the study Thursday, which was based on a 2010 survey of about 5,000 young U.S. adults.
The CDC also reported that about 6 percent of all adults said they had done indoor tanning in the previous year. But nearly one-third of young white women did.