Can psychotic depression worsen if left untreated?

Psychotic depression: Not only can depression worsen if untreated, risk for suicide increases. Psychotic symptoms such as hearing voices or delusions are agonizing to the individual, potentially dangerous and worsen depression. Depression is treatable. See: http://www.everydayhealth.com/depression/psychotic-depression-losing-touch-with-reality.aspx I hope this helps. Best wishes.

Treat depression: Depression is a condition that typically presents with low mood, loss of pleasure, irritability,negative thoughts (including thoughts of suicide) and reduced ability to think clearly. www.mentalhealth.org.nz/get-help/a-z/resource/13/depression. Psychotic symptoms suggest a major depressive disorder with a high risk of suicide. See your Dr soon for diagnosis and treatment.

Yes: Absolutely. This is a serious condition that requires good treatment and treatment engagement (the latter being your responsibility). See your doctor ASAP.