If you are unfortunate enough to be stung by a bee it is advisable to remove the sting with tweasers. The sting itself can then be treated by:
Bathing the infected area in a mixture of water and bicarbonate of soda.
The mixture is:
I litre of water to 10 teaspoons of Bicarbonate of soda.

If you are very unfortunate and are stung by a wasp at the same time. Remove the sting with tweasers. The sting itself can then be treated by:
Bathing the infected area with undiluted Malt vinegar