Having stress can affect the body in many ways.  It is something that can bring emotional and physical problems to the body and there a person should take the appropriate steps to deal with it. 

There are many ways that stress can harm the body.  The release of chemicals called catecholamine from brain will include hormones that include adrenaline and epinephrine.  A person may feel an increase in their heart rate and blood pressure.  This will occur when the body is feeling the stress and their lungs and heart are going to work harder.  The rate of breathing will increase and the lungs will take in more oxygen. 

The blood flow increases to get the body ready for other demands that stress brings on.
A person will probably have dryness of the mouth.  Blood flow will decrease to areas that are less important for basic survival and this will include the mouth.  The cause of dryness of the mouth will mean that a person will have a hard time talking and swallowing.