What is depression
Depression is a mood disorder. The medical term is ‘major depressive disorder’. Major depressive disorder lasts for at least two weeks and affects a person’s ability to carry out their work and usual daily activities and to have satisfying personal relationships.
Depression is more common in females than males. It is often recurrent (that is, people recover but develop another episode later on). Once a person has had an episode of depression they are more likely to have other episodes during their life. Depression often co-occurs with anxiety or substance use disorders.
(Information Mental Health First Aid Manual)