Mental health can affect the way you act towards things. There are many different types of diseases that can cause your mental health to be unclear, such as a dementia. Dementia causes people to lose their memory and even forget where they are. In conclusion, mental health affects how you act and react.
definition of "Mental Health"- a person’s condition with regard to their psychological and emotional well-being.
how it effects- affects how we think, feel, and act. It also determines how we handle stress, relate to others, and make healthy choices. Mental health is important at every stage of life, from childhood and adolescence through adulthood.
Maybe it could be that their brains aren't fully developed and they are going through a lot of different hormones which makes things more intense emotionally.