From talking and eating to breathing and kissing, the lips are involved in a variety of activities, which is why fillers in this area tend to break down faster than those in other areas, such as the tear ducts. Despite what some may believe, there is no scientific evidence that exercise causes fillers to dissolve faster. In fact, the absorption rate of injectable fillers like Juvederm and Restylane, which are made from hyaluronic acid, a natural substance found in the body, will vary depending on the amount of filler used and its location (under the eyes, lips, cheeks, etc.).It is recommended that patients avoid exercising for a few days after receiving injectable fillers to reduce the risk of bruising and swelling. The only way to get fillers to dissolve is by injecting them with hyaluronidase, assuming they are hyaluronic acid-based fillers.
Hyaluronic acid fillers will naturally dissolve over a period of 6 to 12 months due to an enzyme found in the body called hyaluronidase. If you don't want to wait 6 to 12 months for lip fillers to dissolve naturally, you can opt for lip filler-dissolving injections administered by a licensed professional. To ensure that your fillers last as long as possible, it is important to schedule maintenance fills before the first refills have had a chance to wear out. Additionally, repeated applications of filler in the same place can cause the skin to loosen and stretch, resulting in the gradual need for more filler product over time. Certain activities can also affect how long fillers last. For example, wearing glasses that sit tightly on the nose could affect a non-surgical rhinoplasty, while deep cleansing of facials and sleeping on your side or stomach can shorten the lifespan of fillers on the cheeks and jaw.
Ultimately, it is impossible to prevent facial movement completely, so it is inevitable that the filling will break down over time. However, this doesn't mean that lip filling (or filling in any other area of intense movement) will suddenly or drastically fade away.