How to tell if someone is being abused?

Change in behavior is definitely a big factor. probably in emotion too. look for things in a person to really scan that you feel have changed.

Also, bruises or cuts may be a sign of abuse, followed by the actions above.

And , if you see they ALWAYS where long pants , long sleeves , or if they rarely get a hair cut , because they could have some sort of bruises on their neck .

The main factor , is if they are shy . If they come to school , or wherever always with a dull expression on their face , then they are probably scared of people .

Even , if they flinch easily .