What is a chiropractic adjustment?  Is it safe? 

An adjustment is the main method of treatment used by your chiropractor. 
It is a specialized, controlled and safe pressure applied to your spine to restore
the proper motion and position of your vertebrae. It is a precise
procedure that your highly skilled chiropractors have learned and
perfected over years of training and from clinical private practices.

Every health procedure, from taking aspirin to giving blood, involves a level of risk.
Chiropractic adjustments are among the safest of all health care
interventions because they are non-surgical, non-invasive, drug-free and
present an extremely low risk. And they work!