What is the best way to treat a sting by a wasp or bee?

Remove the stinger. If it is a bee, the first thing to do is remove the stinger, this is best done by using the edge of a credit card to scrape it out. Since the venom sac is attached, you do not want to squeeze it. A wasp on the other hand does not lose its stinger and can sting you several times. Once you have been stung, ice is probably the best remedy.
Wasp sting remedies. Remove stinger by scraping along edge of skin with a credit card. Clean area with soap & warm water. Apply ice in 10 minute increments; alternating 10 on & 10 off. Try a bag of cold peas. You can take meds like tylenol, (acetaminophen) Aspirin or Motrin for pain or Benadryl for swelling. Make a paste of 2 parts baking soda & 1 part water & apply. Throat, airway or tongue swelling – call 911. Cont'd.