If you see apparent lines when you look at the mirror (around eyes, at the forehead, around lips etc.) and if they give your face a tired expression, if you would like to regain your past young and stretched look or having plump lips will complement your facial expression, YES, you may have filling.
You may have the application done anytime during the day and go back to your routine. There may be mild oedema. Due to water retention feature of the fill material, an increase in moisture rate of your skin and your skin quality will be seen.