One woman got a sunburn that sent her to the ER. She claims she wore sunscreen and generously applied it several times during the day, but still ended up with 2nd-degree burns. She suspects that her sunscreen had expired. Dr. Sonia Batra shares that the FDA doesn’t require sunscreens to put an expiration date on the bottle, but it’s usually three years. Plus, Dr. Batra warns please not to store your sunscreens in the bathroom because being in the hot steamy environment could actually make them less effective.