A discussion that comes up with so many people. Mental health and mental illness are related, but they're not the same thing.
Mental illness is a clinically significant disruption of a person's thinking, feeling and functioning. It involves distress or suffering that continues for an extended period and impairs the person's functioning in life.
Mental health is (according to the WHO) a state of mental well-being that enables people to cope with the stresses of life, realise their abilities, learn well and work well, and contribute to their community.
A person with a -untreated- mental illness will definitely have deterioration in their mental health. Yet: a person with bad mental health does not necessarily have a mental illness, though. And: a person with a well-managed mental illness can have excellent mental health!
We can ALL take steps to improve our mental health, whether we are mentally ill or not. Physical health (sleep, diet, exercise, and perhaps medication), mental and emotional fitness (mindfulness, emotion regulation, gratitude, reframing) and asking for help (friends, family, professionals) can all contribute to increased mental health and well-being.
Reach out, for both mental illness and ill mental health. Improvements can be made for each and everyone of us, I am absolutely convinced.