Receiving bad news, arguing, fighting, etc. while eating, can cause emotional allergies. Suppose you were fighting while eating a pear. The brain cannot differentiate between the pear and the bad feelings you were experiencing so when you have future contact with a pear, the brain remembers this as a negative energy and mimics an allergic reaction.

Releasing emotional blockages can also be done to eliminate:

-Panic Attacks
-Fears 
-Phobias
-Post Traumatic Stress Disorder

Physical symptoms such as:

-Bedwetting 
-Pain

Most physical symptoms have an emotional component to them.