It was three months before her wedding when Julie Dugdale, a Denver-based writer, noticed an irritation near her nose that wouldn’t seem to go away. She thought it might be a pimple and ignored it. When a little voice inside nagged her to see a dermatologist, she brushed it off. “I didn’t want to hear news I didn’t want to hear before the wedding,” she says. “I figured I’d deal with it later.”