If you get stung by a wasp, there are several steps you can take to alleviate the pain and swelling. Here are some tips from the search results:

At Home Treatment:

• Wash the affected area with warm soap and water to remove any bacteria or venom the wasp might have carried.
• Apply a cold pack wrapped in a thin cloth to the sting site for 30 to 60 minutes, in intervals of 10 minutes on and off. This will help reduce the swelling and pain of the wasp sting.
• Take an over-the-counter antihistamine medication such as diphenhydramine (Benadryl) to reduce discomfort.

When to Seek Medical Attention:

• If you have been stung in the mouth, nose, or throat, you should seek medical attention.
• If you experience symptoms of a severe allergic reaction such as swelling of the face, lips, or throat, hives or itching in areas of the body not affected by the sting, breathing difficulties, dizziness, sudden drop in blood pressure, lightheadedness, loss of consciousness, nausea or vomiting, or diarrhea, seek immediate emergency care to treat anaphylaxis.

It is important to note that most people do not need emergency medical treatment if they are stung.