If you get stung by a bee, you can scrape the sting out with a fingernail - squeezing it only injects more venom.
Treat bee stings with a slice of onion or a paste of bicarbonate of soda and water.
Treat wasp stings by covering with a compress of cotton wool soaked in lemon juice.
If after you are stung, you feel ill or itchy all over, see a doctor immediately.