Stress can become an issue, causing physical and mental health problems, if levels are high or it is experienced over a long period of time.

With phobias, specific objects or situations create an intense and persistent fear that is out of proportion with the actual danger posed.

PTSD is triggered by experiencing or witnessing a traumatic event and can interfere with your ability to function day-to-day.

Obsessive-compulsive disorder is characterised by thoughts or behaviors that can cause significant problems in a person's daily life.

Depression is a common but serious mood disorder that can make it hard to handle day-to-day activities and enjoy life.

It's normal to worry when dealing with stressful events. However, when worrying becomes overwhelming, an anxiety disorder may be the cause.