Assess the Damage
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Most sunburns aren't severe enough to send you to the ER. Even if a couple of small blisters pop up, it's usually safe to treat the burn at home. "But if you develop blisters on more than 20 percent of your body, seek medical attention immediately," says Bowe. You should also head to the hospital if you feel nauseous, get intense chills, or run a fever.