Most often, they bite on the arms, legs and back ... "you can get blisters on top because it's so swollen," Kassouf says.

Elevate the arm of leg where the injury has happened ... while spider bites might lead to more severe swelling and pain.

reactions to insect bites fall into three categories ... not better The swelling involves more than one-third of your arm or leg Pain and swelling stop you from using that part of your body.