Preparing for lip filler starts about two weeks before your appointment and comes down to a few straightforward steps: avoiding things that increase bruising, getting your skin ready, and planning your schedule so your lips have time to heal. Most of the prep is about what you stop doing, not what you start.
What to Stop Taking Two Weeks Before
The biggest concern before any filler appointment is bruising. Your lips have a dense network of blood vessels, and anything that thins your blood makes bruising more likely and more visible. Stop taking over-the-counter anti-inflammatory painkillers like ibuprofen, aspirin, and naproxen at least a week before your appointment, ideally two. These interfere with your blood’s ability to clot at the injection site.
Several common supplements do the same thing. Fish oil, vitamin E, ginkgo biloba, and St. John’s wort all have mild blood-thinning effects. Cut these out on the same timeline. If you take a prescribed blood thinner for a medical condition, talk to your prescribing doctor before stopping anything. Never discontinue a prescribed medication on your own for a cosmetic procedure.
If you use a retinoid cream (tretinoin or retinol) on or around your lips, stop applying it two days before your appointment. Retinoids thin the outer layer of skin and can make the injection sites more sensitive and prone to irritation.
Cold Sore History Matters
If you’ve ever had a cold sore, even once, the trauma of a needle in your lip can reactivate the virus. This is one of the most commonly overlooked parts of filler prep. The injection itself creates tiny wounds, and the herpes simplex virus that causes cold sores lives dormant in nearby nerve tissue. Swelling, stress to the tissue, and a temporarily weakened skin barrier can all trigger an outbreak.
Let your injector know about your history before your appointment. They can prescribe an antiviral medication to take starting a day or two before the procedure and continuing for a couple of days after. This dramatically reduces the risk of a flare-up. Showing up to your appointment with an active cold sore means it will need to be rescheduled.
Schedule Around Dental Work and Vaccines
If you have a dental cleaning or any other dental procedure coming up, schedule it at least two weeks before or two weeks after your filler appointment. Dental work introduces bacteria into the bloodstream, and freshly injected filler creates a site where bacteria can potentially settle. The two-week buffer gives the filler time to integrate with your tissue and the injection sites to fully close.
Vaccines are worth thinking about too. Flu shots, COVID boosters, and other vaccinations can trigger an immune response that occasionally causes delayed swelling or inflammation at filler sites, sometimes weeks or months after injection. A consensus paper published in Dermatology and Therapy confirmed that changes in immune status from vaccinations have been linked to late-onset reactions in patients with hyaluronic acid fillers. There’s no universally agreed-upon waiting period, but spacing your filler and any vaccination by at least two weeks in either direction is a reasonable precaution.
The 24-Hour Countdown
In the final day before your appointment, cut out alcohol and caffeine. Both cause blood vessels to dilate, which increases blood flow to the surface and makes bruising worse. Alcohol also has a direct blood-thinning effect. Even a single glass of wine the night before can make a noticeable difference in how much you bruise.
This is also a good time to start hydrating more than usual. Hyaluronic acid, the substance in most lip fillers, works by drawing water to itself. Going into your appointment well-hydrated helps the filler settle smoothly and can improve your initial results. Aim for consistent water intake throughout the day rather than chugging right before you leave.
The Morning of Your Appointment
Arrive with a clean, bare face, at least from the nose down. Wash your face a few hours before your appointment and skip all lip products: lipstick, gloss, balm, and foundation around the mouth. Your injector will clean the area with an antiseptic before starting, but beginning with a clean canvas reduces the risk of pushing bacteria or product residue into the injection sites.
Eat a normal meal before you go. Filler appointments are short, usually 15 to 30 minutes, but arriving on an empty stomach can make you feel lightheaded, especially if you’re nervous. A solid meal and a bottle of water beforehand will keep you comfortable.
Wear something you can pull on and off without dragging across your face. A zip-up hoodie or button-down shirt is ideal. Your lips will be swollen and tender immediately after, and tugging a crew neck over your head is the last thing you’ll want to do.
Planning for Recovery
Your prep should also include planning the days after. Swelling peaks around 24 to 48 hours post-injection, so most people prefer to schedule their appointment at least two to three days before any events, photos, or important meetings. Some people swell minimally, others look noticeably puffy. You won’t know which category you fall into until your first time.
Stock up on a few things before your appointment so they’re ready when you get home. An ice pack or bag of frozen peas for intermittent icing during the first few hours makes a real difference in swelling. Some practitioners recommend starting arnica (a natural supplement available as tablets or topical gel) right after the procedure and continuing for about a week to help bruising resolve faster. Bromelain, an enzyme found in pineapple, is another option sometimes recommended alongside arnica for reducing swelling.
For the week following your appointment, reduce your sodium intake. Salt causes your body to retain water, and since hyaluronic acid filler already attracts moisture, high-sodium meals can amplify swelling beyond what’s normal. Keep drinking plenty of water during this period too. It sounds counterintuitive, but staying hydrated actually helps your body flush excess fluid rather than hold onto it.
What to Tell Your Injector Beforehand
Come prepared to share a few things at your appointment, or better yet, mention them when you book. Let your injector know if you have a history of cold sores, if you’ve had any vaccinations in the past two weeks, if you’re taking any blood-thinning medications or supplements, and if you have any autoimmune or inflammatory conditions. A good injector will ask about all of this, but volunteering the information ensures nothing gets missed.
If you’re currently dealing with any active skin infection, inflammation around the lips, or are feeling generally unwell with flu-like symptoms, the appointment should be postponed. Injecting filler into tissue that’s already fighting an immune battle increases the chance of complications. Rescheduling by a week or two is always the safer choice.