Mood disorders primarily affect an individual’s emotional state. They can range from periods of continued sadness (depression)1, or episodes of mood swings ranging from depression to manic highs (bipolar disorder).2
People with depression may feel sad, empty, or hopeless, and lose interest and pleasure in activities they used to enjoy.1 They are also likely to have cognitive symptoms, such as difficulty making decisions.1
People with bipolar disorder have times when they seem abnormally cheerful and full of energy, which can lead to impulsive and risky behaviours or doing things that might have disastrous consequences.3
Anxiety is a feeling of unease, such as fear or worry that can be mild or severe.4 People with generalised anxiety disorder, for example, have uncontrollable worries about various everyday things, such as their responsibilities, finances, and health.5
Post-traumatic stress disorder can develop following a traumatic event, such as exposure to violence or a vehicle accident, and may result in recurring nightmares and flashbacks.6
Mood and anxiety disorders are relatively common in the UK.7
Gain a deeper understanding of depression here, bipolar disorder here, generalised anxiety disorder here and post-traumatic stress disorder here.