For a brand new bite, try After Bite; it contains ammonia, which helps relieve the stinging sensation, says Lynn J. McKinley-Grant, MD, an associate clinical professor of dermatology at the Washington Hospital Center in Washington, D.C. For bites that are getting itchy, New York City-based dermatologist Debra J. Wattenberg, MD, recommends spot treating with an over-the-counter hydrocortisone cream and, if necessary, taking an oral antihistamine like Benadryl or Claritin. If you have lots of bites and are very itchy all over, she suggests Sarna Anti-Itch Lotion; it provides a cooling sensation that can be very helpful. And remember, try not to scratch! Too much scratching can lead to infection. (If a bite starts to ooze, apply an antibiotic ointment like Neosporin or Polysporin, says Dr. Wattenberg.)