Depression is a condition that affects your mental health. People who suffer from depression may experience intense feelings of hopelessness, anxiety and negativity for an extended period of time. Depression can present itself forms such as seasonal depression and persistent depressive disorder. Symptoms include sleeping problems, difficulty concentrating, fatigue, changes in appetite and suicidal thoughts. Medical treatment includes antidepressants such as Selective Serotonin reuptake inhibitors, while cognitive behavioural therapy (CBT) can be an alternative to drugs.