A wasp injects its venom by stinging. This venom is poisonous in nature and may cause direct harm to the human body. However, the positive thing is that this injury is usually confined to the region close to the sting. The common symptoms of a wasp sting are swelling, redness, pain, itching, skin hives, and local infection. If you have got stung by a wasp, don't panic as from the following passages you will know how to treat a wasp sting at home. Have a look!