Is it correct to say that family is an internal factor affecting mental health?

Correct. Family is the most important part of everyone's life. It grew up in a family environment from birth, and will form a new family after adulthood. Therefore, the relationship between family members will affect personal emotions. For example, in a good atmosphere, a person's body and mind will be very comfortable and happy, and parents, spouses and children will all affect a person's values.