If you exercise while wearing earbuds – you’re at risk from cardio ear! It’s similar to swimmer’s ear – because when sweat collects in your ear canal, it can cause an infection within 24-hours. Ear, nose and throat specialist Dr. Eugene Chio says when sweat gets trapped in your ear, it creates the perfect moist environment for bacteria to thrive. So how do you know if you have cardio ear? It’ll be painful, throbbing with an oozy discharge… and it’s not just gross, it’s dangerous. It could rupture your eardrum! So give your earbuds a rest at least once a week – and go old-school with over-the-ear headphones.