Dr. Dhaval Bhanusali was recently featured in Popsugar article, ‘ Have a Sun Rash? 3 Dermatologists Weigh In on What to Do ‘. Here’s an excerpt. There are lots of instances when you might experience a sun rash in the Summer months. Maybe the UV index is especially strong while you’re outside, or it’s your first exposure of the season. According to dermatologist Dhaval Bhanusali, MD, about 20 percent of people are prone to these red, splotchy rashes and it’s something he sees frequently in his office, so there’s no need to panic. The rash can involve uncomfortable side effects like itchy red skin with bumps, blisters, and red patches, but may go away by itself within 10 to 14 days.