Anxiety : Anxiety can be described as a feeling of alarm or “worry”. It may be about something specific or it may be non-specific in nature. A certain amount of anxiety is normal and helps improve our performance and allows people to avoid dangerous situations. This normally lasts for a short period causing no impairment in social or occupational functioning. When this anxiety is prolonged and affects social or occupational functioning, it's abnormal and accounts for anxiety "disorder".
Anxiety Neurosis is commonly misspelled as Anxiety Nuerosis, Anxiety Nerosis. Anxiety Neurosis is called as Chinta neurosis in Hindi and Chinta majjatantuncha wikaar in Marathi.
Depression : Depression is a chronic, long-lasting or recurring and treatable disorder, where the patient experiences sadness, worthlessness, loss of motive, loss of interest and/or hopelessness.
A depressive disorder is an illness that involves the mood and thoughts and in simple words can be expressed as persistent sad mood. Depression is not a character flaw or a sign of personal weakness and the suffering person can't make himself well by trying to snap out of it. Depression affects the way a person eats and sleeps, the way one feels about oneself, and the way one thinks about things.
Depression results from a complex partly understood biochemical changes in the brain, which are influenced and supported by multiple causes inclusive of the genetic trait, circumstantial factors, hormonal factors, socio-personal reasons, etc. Increased levels of brain chemicals called neurotransmitters, such as serotonin and norepinephrine are found to improve the state of depression.