Mental Health is a level of psychological well-being, or an absence of mental illness. It includes our emotional, psychological and social well-being; affecting how we think, feel and act. It helps determine how we handle stress, relate to others and make choices. Mental  disorders are a wide range of conditions that affect thinking, mood and behaviour; for example anxiety, depression and substance use disorder(SUD/Addiction).

Addiction can either be a substance use disorder (SUD) or a behavioural addiction e.g. Pornography Addiction, Gambling.
A SUD is a problematic pattern of use of an intoxicating substance leading to clinically significant impairment or distress, as manifested by at least two of the following, occurring within a 12-month period; (Diagnostic Statistical Manual, DSM-5)

These conditions can affect people of all ages. Crises in life, like illness in ourselves or a loved one, or the death of a close family member or friend, could change our lives overnight. We can descend into depression without
recognizing what is happening to us.

Depression is an affective(mood) disorder in which one feels constantly sad; life seems bleak, and its challenges overwhelming. It is a severely disabling condition that has a profound effect on all aspects of a sufferer’s life, including personal and family life, productivity in the workplace/education and enjoyment of leisure activities. It is one of the most common of all Psychiatric disorders. Depression is ranked by WHO as the single largest contributor to global disability.