Saul Loeb/Getty Images Trump’s mysterious neck rash may stem from his love of the putting green. The rash on 79-year-old President Donald Trump was first spotted on Monday, two days after Trump announced strikes against Iran. Immediately, there was a flurry of speculation about the large mark on the right side of the president’s neck. According to board-certified dermatologist and dermatologic surgeon Dr. Dustin Portela, the mark could be caused by Trump’s frequent golfing under the bright sun. Portela told the Daily Beast that the redness and flakiness of the nasty rash are “characteristic” of a chemotherapy cream that prevents the progression of precancerous lesions or actinic keratosis into a more serious case of skin cancer. Read more at The Daily Beast.