Psychologist is person who holds a degree in psychology and is able diagnose and treat mental illness with counselling therapies.They cant be called as doctor as they never attend a medical school and can't prescribe medicines.

Psychiatrists are medical doctors who can treat complex mental health issues like severe depression, schizophrenia, bipolar disorder and suicidal tendencies by prescribing medicines.A psychologist is specialized in treating behavioral issues, learning difficulties and anxiety etc.

A psychologist will talk to you and listen to your problems. He/She will do an interactive conversation with you to understand the cause mental distress.

One should consult a psychologist if facing issues like excessive stress, anxiety or any kind of phobia, anxiety or feeling too low for unusually long time.

No, a Psychologist is not a medical professional specialized in medicines, so he/she can't prescribe medicines.They help in treating mental health issues with counselling sessions.