Lip fillers add volume. More volume can be added over a period of time to build a bigger lip. Lip fillers can correct asymmetries, and results are instant and usually last up to 9 months. Downtime includes swelling and possible bruising.
Lip flips ony work on people whose top lip curls under when smiling. Lip flips use Botox injections, not a dermal filler. The goal of a lip flip is to relax the muscles around your mouth to stop the top lip from curling under when you smile. The results of a lip flip take about 2 weeks to set in and last about 8 weeks. Lip flips can’t correct asymmetries or add volume to your lips. There is no downtime, you it can feel a little weird at first when whistling or drinking through straws.