What type of damage do you have?
Gap in door frame allowing light and insects (mosquito)
Go to Lowe’s
We need to know what is wrong with it in order to give you suggestions.
Gaps in frame therefore allowing insects and light in!
Go to your local home improvement store and speak with an associate that works back in the door department. I am sure there are some strips or trim you can put on the door to close up the gap when it is closed.