From the time she was 13 years old and tried a popular moisturizer on her face that brought "catastrophic red results," Cheryl Costello knew she had very sensitive skin.
Over the years, the redness on her face intensified. Next, blood vessels became noticeable and bumps (papules) began to appear.
"I had no idea what was happening, but I knew it was serious," she said. "I saw several doctors who thought it might be rosacea. One prescribed a topical ointment, which made my face worse, so I thought I just had to live with it."