How soon does anaphalactyic shockboccur after bee sting?

Depending on the person's sensitivity, the amount of venom for a sting or saliva for a bite and the blood flow to the area the body's reaction that leads to shock could begin immediately or it may never occur.

One of the steps in first aid for somebody who is sensitive would be to ice down the site of the sting or bite. That slows down blood flow and buys him more time to get treatment.

Few cases of anaphylactic shock come from being bitten by a bug. Most result from the sting of stinging insects such as bees, wasps and hornets.