The biopsychosocial model for psychiatry is a way to formulate what factors are in play in an individual’s illness. It can also be used as a way to approach what aspects you need to consider when deciding on a treatment plan.
The biological factors include things such as genetics, general medical conditions and drugs (pharmacotherapy).
The psychological factors include a person’s coping strategies, personality and therapy (cognitive behavioural therapy, psychodynamic psychotherapy, dialectic behavioural therapy, etc).
The social factors include a person’s living situation, their support (both family and friends), finances, situation at work/school, etc.
And because that’s a teeny weeny image, here is a lovely PDF to download and print: