Most of us have felt anxious or tense at some point in our life.

Anxiety is a normal reaction and moderate levels can motivate us to work harder or protect ourselves from dangerous situations.

Generalised anxiety disorder refers to an excessive and persistent worry that is not necessarily triggered by a stressful situation.

We usually experience symptoms such as sweating, palpitations, chest pains, muscle tension and stomach upsets.

We also may have difficulties with our sleep and ability to concentrate.

Sometimes fear, anxiety and worry take other forms. The most common diagnoses are: panic disorder, agoraphobia, social anxiety, phobias, obsessive-compulsive disorder (OCD), post-traumatic stress disorder (PTSD) and hypochondriasis.