Acne scarring may change in appearance from day to day, depending on your skin health. Dehydration, hormonal changes, stress and alcohol consumption all impact the appearance of your skin generally, which will also emphasise any textured scarring or discolouration you may have.
Maintaining a good skincare routine, including ingredients such as hyaluronic acid to hydrate your skin and retinoids to encourage skin cell turnover will improve your overall skin health and help to reduce the appearance of scarring, even on days when you may not be feeling your best.