When you get stung by a bee, hornet, wasp, yellow jacket, or stinging caterpillar, you can relieve the pain almost instantly and greatly lessen the effects of swelling by pouring ammonia on the sting. The ammonia breaks down the protein in the poison. You can pour ammonia into small containers, such as plastic lemon squeezers, and keep them handy in your gardening areas so that you can get to them quickly. The sooner you use the ammonia, the less pain, heat, and swelling you will experience.