Typically, with lip fillers, results are instant! However, you should still ask a professional about what you personally can expect. Right after your treatment, you may notice your lips are fuller and possibly a bit swollen, but after a short while, the swelling will go down and you should be left with full, beautiful lips. It can take around four weeks for a filler to settle in and give you the final results you were aiming for, but you will likely notice immediate results, and your results will likely be long lasting.