The choices you make in the days before a filler appointment have a direct impact on bruising, swelling, and your overall results. Most preparation comes down to one goal: keeping your blood’s clotting ability intact and your skin free from irritation or infection. Here’s what to avoid and when to stop.
Skip Blood-Thinning Pain Relievers
The biggest risk factor for post-filler bruising is anything that thins your blood. Ibuprofen (Advil, Motrin), naproxen (Aleve), and aspirin all interfere with your platelets’ ability to form clots, which means even a small needle poke can leave a visible bruise that lasts a week or longer.
Stop taking NSAIDs like ibuprofen and naproxen at least 7 days before your appointment. Aspirin requires an even longer window: 14 days, because its blood-thinning effect on platelets is irreversible for the lifespan of those cells. This includes baby aspirin and combination products like Excedrin, Alka-Seltzer, and Anacin. If you need pain relief during this window, acetaminophen (Tylenol) is generally considered safe because it doesn’t affect clotting.
If you take a prescription blood thinner like warfarin, heparin, or any antiplatelet medication, do not stop it on your own. Talk to your prescribing doctor first. Stopping these medications without guidance carries serious health risks that outweigh any cosmetic benefit.
Cut Out Alcohol for at Least 24 Hours
Alcohol thins the blood and dilates blood vessels, both of which increase your chances of bruising. Stanford Medicine’s pre-treatment guidelines recommend avoiding alcoholic beverages for at least 24 hours before filler. Many practitioners suggest 48 to 72 hours for better results. High-sodium foods in the days leading up to your appointment can also worsen swelling after injection, so dialing back salty meals is worth the effort.
Watch Out for Supplements and Herbs
Several popular supplements have blood-thinning properties that catch people off guard. Fish oil, vitamin E, ginkgo biloba, garlic supplements, ginseng, and St. John’s wort can all increase bleeding. Stop these at least 7 days before your appointment, the same window as NSAIDs.
One supplement that works in the opposite direction is worth mentioning: Arnica Montana tablets, taken starting three days before treatment, and bromelain (found in fresh pineapple or as a supplement), taken two days before, may actually help reduce bruising and swelling. These are sometimes recommended by clinics as part of a pre-treatment protocol, not something to avoid.
Don’t Come In with an Active Infection
Any active infection near the injection site is a firm contraindication for filler. This includes cold sores, dental infections, sinus infections affecting the face, and any skin infection like acne cysts in the treatment area. Injecting filler into tissue that’s fighting an infection can spread bacteria deeper and trigger a serious complication. If you wake up with a breakout, a cold, or a dental abscess on the day of your appointment, reschedule. It’s not worth the risk.
Tell Your Provider About Cold Sore History
If you’ve ever had a cold sore, even once, lip filler can trigger a reactivation. The trauma of the needle is enough to wake up the herpes simplex virus that stays dormant in nerve cells. This doesn’t mean you can’t get lip filler. It means your provider needs to know so they can prescribe an antiviral medication beforehand.
The standard protocol calls for starting an antiviral like valacyclovir two days before treatment and continuing it for a total of five days. Skipping this step when you have a history of cold sores is one of the most common preventable complications in lip filler. Be upfront about it, even if your last outbreak was years ago.
Pause Retinol and Strong Actives
Retinoids, chemical exfoliants like glycolic acid and salicylic acid, and prescription acne treatments like tretinoin all increase skin sensitivity and can thin the outer layer of skin. Using them right before filler makes the skin more prone to irritation, redness, and bruising at the injection site. Most providers recommend stopping retinol and active exfoliants 3 to 5 days before your appointment. You can resume them once any injection-site tenderness has resolved, typically after a few days.
Don’t Schedule Right After a Vaccine
Vaccines trigger an immune response, and dermal fillers sit in tissue where your immune system can interact with them. Getting filler too close to a vaccination can amplify swelling or trigger an inflammatory reaction around the filler. While there’s no universally agreed-upon waiting period, most practitioners recommend spacing filler and any vaccine at least two weeks apart in either direction. If you’ve recently had a flu shot, COVID booster, or any other vaccination, mention it at your consultation.
Avoid Intense Exercise the Day Of
A hard workout before your appointment raises your heart rate and blood pressure, which increases blood flow to your face and makes bruising more likely. It also leaves you flushed and warm, which can amplify swelling after injection. Skip the gym on the day of your appointment. A light walk is fine, but save the cardio and weight training for the next day at the earliest.
Don’t Show Up with a Full Face of Makeup
Your provider will clean the treatment area before injecting, but arriving with heavy makeup, especially around the injection sites, introduces unnecessary bacteria. Come with a clean face or minimal makeup that’s easy to remove. Most clinics will cleanse the area themselves, but starting with clean skin reduces infection risk and speeds up the appointment.
A Quick Timeline
- 14 days before: Stop aspirin and aspirin-containing products
- 7 days before: Stop NSAIDs (ibuprofen, naproxen), fish oil, vitamin E, and herbal supplements with blood-thinning effects
- 3 to 5 days before: Pause retinol, chemical exfoliants, and strong actives on the treatment area
- 2 to 3 days before: Start antiviral medication if you have any cold sore history (prescription required)
- 24 to 48 hours before: Stop drinking alcohol and reduce high-sodium foods
- Day of: Skip intense exercise and arrive with clean skin
Most of these steps are simple, but the cumulative effect is significant. People who follow a careful pre-treatment protocol consistently experience less bruising, less swelling, and faster recovery than those who don’t prepare at all.