Teeny bikinis leave little to the imagination as it is, but when you're suffering from a less-than-pleasant beauty situation, it can feel like you're under a microscope. Case in point: that ingrown hair plaguing your bikini line. Jamie Ahn, owner of New York's Acqua Beauty Bar, has seen her fair share of swimsuit-related mishaps. "Brazilians and bikini waxes are always more popular in the Summer," she says. "Because of this, there are always more issues with ingrown hairs." To get Ahn's insight on what causes ingrown hairs, how to prevent them, and how to treat them when you find yourself with one, just keep reading.