Stings and insect bites will usually heal on their own. To relieve pain, itching, and swelling, apply an ice pack for 15-20 minutes per hour for 6 hours. Elevate the area and use over-the-counter antihistamines, anesthetics, or hydrocortisone cream. Wash the area twice daily with soap and water, apply rubbing alcohol or antiseptic, and cover with a bandage. Seek medical help if symptoms worsen or new symptoms develop.