-
Step 1
A person eats a food or substance that causes an allergic reaction for the first time. -
Step 2
The person swallows the food or substance and then the body creates an antibody or a protein that can detect the harmful substance. -
Step 3
Then the antibody attatches to the cells found in tissues all over the body. This prepares the body to expect the food or substance if it enters the body again. -
Step 4
When the food or substance enters the body again, it attaches to antibodies. It then sends out signals to the body and releases large amounts of histamine. -
Step 5
The histamine then causes swelling and irritation in some parts of the body. -
Step 6
The result of histamine can vairy from person to person. It can range from mild hives to anaphylaxis.
