Good personal hygiene involves keeping all parts of the external body clean and healthy. It is important for maintaining both physical and mental health.
In people with poor personal hygiene, the body provides an ideal environment for germs to grow, leaving it vulnerable to infection.
On a social level, people may avoid a person with poor personal hygiene, which may result in isolation and loneliness.Keeping your body clean helps prevent illness and infection from bacteria or viruses. Like in our example, the simple act of washing your hands regularly is an effective way to keep germs from spreading.
first steps would be trying to talk or advising her to talk to someone trusted and if she doesn't feel comfortable ease her into healthy habits that could not only help her mental health but physical aswell