This is a very difficult phobia which can really interfere with a child's life.

An anxiety disorder in which the child can talk easily at home but does not in other situations.

There are some situations where OCD and other symptoms can be the result of an infection. 

A discussion of OCD

Slowing down your breathing can really help with anxiety

Anxiety has traditionally been thought of in terms of a fight or flight response involving the sympathetic nervous system. But there is increasing appreciation of a freeze or immobility response-and we can see this operating in our anxious children