Confused thinking or problems concentrating and learning. Extreme mood changes, including uncontrollable “highs” or feelings of euphoria. Prolonged or strong feelings of irritability or anger. Avoiding friends and social activities.

What does someone with mental illness look like or how do they act?

The outward signs of a mental illness are often behavioral. A person may be extremely quiet or withdrawn. Conversely, they may burst into tears, have great anxiety or have outbursts of anger. Even after treatment has started, someindividuals with a mental illness can exhibit anti-social behaviors.

How do people act when they have a mental illness?

Feeling of disconnection or withdrawal from normal activities. Unusual or magical thinking. Excessive anxiety. Prolonged sadness, depression or apathy.

Which mental illness is the most severe?

Here we look at two of the most common severe mental illnesses: schizophrenia and bipolar disorder (or manic depression). Schizophrenia is a serious mental illness that affects a persons thinking, and that can consequently alter their perception of reality, their emotions and their behaviour.