Sunburn is a telltale sign that you’ve been out in the sun for far too long. Characterized by “red, painful skin that feels hot to the touch,” sunburn is a result of overexposure to the sun’s harmful ultraviolet rays [1]. While most cases clear up after a few days, some can be more serious, and cause blisters and swelling of the skin, along with flu-like symptoms such as fever, chills, and nausea [2]. It’s also…