I was stung by a blue bottle yesterday. i have redness, itchiness and swelling in the area around the sting. i don't have any pain anymore or any other symptoms. do i just wait for the swelling to go away? or should i do something else?

If your symptoms are improving, you may watch and wait. If the area of sting develops additional swelling, discharge, or you get fever, it would be prudent to see a doctor. Have a healthy diet, exercise 30 minutes/day, drink plenty of water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. For nutrition: http://www.choosemyplate.gov/.