INTRODUCTION
Health psychology a branch of the science of psychology can be defined
as the study of psychological and behavioral processes in health, illness, and health
care (Johnston, M.1994). Psychological factors can directly affect health such as stress causes the
release of hormones like cortisol which can damage our body gradually and indirectly through
a person's own behavior choices such as smoking or doing exercise which can harm or protect
health (Ogden, J.2012).