When you hear about dissolving filler, the first concern is often needles and pain. People wonder how much it hurts to get hyalase in sensitive areas like the lips or nose, and how much numbing cream can help. Pain varies with the nature of the injected drug, the thickness of the tissue in the area, and how anesthesia is prepared.

The Bottom Line First

Dissolving filler is a procedure where hyalase (hyaluronidase, an enzyme that breaks down hyaluronic acid) is injected into hyaluronic acid filler. Pain mainly comes from the needle prick and the pressure as the drug spreads, and thin, sensitive areas like the lips may feel more intense. Numbing cream can reduce discomfort but won't eliminate it completely. The procedure itself takes about 10–15 minutes, and swelling and bruising often subside within a few days. The degree of pain and the anesthesia method depend on the type of filler, injection depth, and allergy history.

What Does Hyalase Dissolve, and Why Does It Hurt?

Not all fillers are the same. There are products with different injected ingredients, such as hyaluronic acid filler and collagen injections, and even the same filler can be manufactured differently. ATTITUDE Clinic column also explains that collagen injections work differently from hyaluronic acid filler.

Male doctor explaining skin cross-section to a woman

Hyaluronidase is an enzyme that breaks hyaluronic acid into small pieces. When it contacts hyaluronic acid filler, the gel structure collapses into fragments the body can absorb. According to Cleveland Clinic, hyalase only breaks down hyaluronic acid filler, and fillers made of other ingredients like silicone do not respond to the same method.

Where does the pain come from? Hyalase is injected with a needle. The needle prick as it enters, the pressure as the drug spreads and expands tissue, and tenderness after injection all combine. American Society of Plastic Surgeons also explains that hyalase injection is a needle injection, so there are risks of pain, bruising, bleeding, and swelling.

Areas with thin and sensitive skin, like the lips, may feel more even with the same needle. According to the ATTITUDE Clinic column, injection pain varies by area and individual pain threshold, and the forehead, eye area, and around the lips are relatively sensitive.

Hyalase spreads into the tissue at the injection site. So it's difficult to dissolve only a very narrow area, and even if you want partial correction, results can be hard to fine-tune. The American Society of Plastic Surgeons also notes that dissolving only a small amount is difficult.

What can be dissolved is hyaluronic acid filler, and pain is created by the needle, the area, and the spread of the drug together.

How Much Can Numbing Cream Reduce Pain?

Anesthesia often starts with a topical cream. Cleveland Clinic explains that numbing cream can be applied to reduce discomfort when dissolving lip filler.

Numbing cream dulls the sensation on the skin surface and is used to reduce needle pain. However, it doesn't completely eliminate the pressure as the drug spreads. Because it's an injection, some discomfort may remain.

Procedure time is about 10–15 minutes. Even if short, multiple needle insertions can cause repeated pricks. In injection procedures, using a fine needle to prick multiple points causes repeated pricks, while using a thin tube with a rounded tip is explained to cause a prick only on initial insertion.

The time and area for applying numbing cream, needle thickness, and injection speed are determined during consultation. If you're afraid of needles or have had severe pain before, it's better to mention it in advance. There may be room to adjust the anesthesia plan.

Numbing cream reduces needle pain but doesn't eliminate the feeling of the drug spreading.

Why Does Pain Differ by Area: Lips, Nose, Under-Eyes?

Even with the same hyalase, pain differs by injection site. In forehead, eye area, and around the lips, where tissue is thin and close to bone, the injection sensation can feel more sensitive. Thicker areas like the cheeks or jawline are relatively less painful.

When dissolving nose filler, the depth of the filler, the extent of spread, and current swelling are checked during consultation. Even in the same nose, the sensation of the injection varies with depth, and if swelling remains, it's harder to distinguish areas.

Preparation before the procedure also affects pain and bruising. According to Cleveland Clinic, avoid medications and supplements that can increase bleeding, such as aspirin or fish oil, and stop smoking a few weeks before as it can hinder recovery.

If you've had a severe reaction after a bee sting, you cannot receive hyalase due to the risk of anaphylaxis. You must mention this history during consultation.

Tissue thickness at the site and preparation before the procedure determine the extent of pain and bruising.

Dissolve All at Once or in Stages?

Whether to dissolve all at once or in stages depends on the amount of filler and the size of lumps. Cleveland Clinic notes that usually 1–2 visits are needed, and larger amounts or lumps may take more than one session.

Some feel changes immediately after the procedure, but complete results can take up to 2 weeks. Hyalase spreads into the injection site, so dissolving only a small area precisely is difficult. When partial correction is desired, a smaller amount is used, but the spread makes precise prediction difficult.

Dividing injections means multiple visits and injections, so the number of painful days increases. However, it can reduce the burden of injecting a large amount at once. The timing for refilling with filler after dissolving is determined during consultation after swelling subsides and results settle.

Dissolving is usually planned for 1–2 sessions, but larger amounts or lumps may take longer.

Table 1 Dissolve All at Once or in Stages?
Check Item Information Provided Questions to Ask During Consultation
Filler Type Hyaluronic acid filler is broken down by hyalase, but other ingredients like silicone do not dissolve. Is the filler I received hyaluronic acid?
Allergy History If you have bee venom allergy, hyalase cannot be administered due to anaphylaxis risk. I've had severe swelling after a bee sting.
Anesthesia Method Numbing cream can be applied to the lips to reduce discomfort. How much numbing cream is applied?
Time and Sessions The procedure takes 10–15 minutes, usually 1–2 sessions, and larger amounts or lumps may take longer. Will one session be enough?
Aftercare First 1–2 days cold compress, 5 days massage, avoid aspirin 7 days before procedure. What do I do at home?

Swipe sideways to see the whole table.

In summary hyalase acts on hyaluronic acid filler, and pain is created by the needle, injection site, and the extent of drug spread. During consultation, mention the filler type and allergy history first, and it's good to decide together how to apply numbing cream and how to monitor swelling and bruising after the procedure.

If This Applies to You

Woman sitting at table holding a towel-wrapped cold pack near her lips with a male doctor

If you're dissolving lip filler and have an important event a week later

Swelling and bruising often subside within a few days, but complete results can take up to 2 weeks. If the event is close, schedule the procedure earlier and secure time for cold compresses for the first 1–2 days. Even with numbing cream, swelling may remain, so it's better to leave a gap before photo shoots or interviews.

Woman holding a hand mirror and touching the side of her nose while a male doctor watches

If you're concerned about nose filler but worried about visible swelling

Swelling around the nose is easily noticeable. Apply cold compresses for the first 1–2 days, and avoid strenuous exercise and alcohol for 24 hours. Check during consultation whether the filler is hyaluronic acid and at what depth it was placed.

Doctor pointing at patient's cheek during consultation

If you have sensitive or easily reddened skin

You may worry about irritation even after applying numbing cream. Inform in advance if you had redness or itching in previous procedures. If rash or itching occurs after the procedure, contact the clinic early.

Doctor and patient sitting across a desk talking, with a small travel bag beside them

If you're an overseas visitor with a short stay

Hyalase is usually planned for 1–2 visits, and complete results can take up to 2 weeks. Include a follow-up check within your stay and check swelling and bruising before returning home.

Please tell us before consultation

  • Type and timing of filler received, and area
  • Severe reaction after bee sting, drug and supplement allergies
  • Medications being taken such as aspirin, fish oil, anticoagulants
  • Recent skin procedures, inflammation, and remaining swelling
  • Important schedules and length of stay

How ATTITUDE Clinic Proceeds

  1. Questionnaire and skin records We check the type and timing of fillers received so far, allergies, and medications. When skin conditions are recorded with a device, that record is information organized for reference and does not replace diagnosis.
  2. Check area and depth We examine in the clinic whether it's swelling or filler, and at what depth it was placed. Even in the same area, the injection plan varies with tissue thickness and swelling, and the treatment plan is determined by the medical staff during the consultation.
  3. Anesthesia and procedure plan We decide whether to apply numbing cream and how much to approach at once. The procedure takes about 10–15 minutes and is divided into 1–2 sessions if needed.
  4. Follow-up and guidance We check whether swelling, bruising, and pain are decreasing and inform you of the next visit timing. ATTITUDE Clinic treatment guide lists 1 session of hyalase, and prices are listed excluding VAT.

Four steps your doctor sees to in person

From the diagnostic device to the treatment bed, the doctor you first consult takes care of everything.

  1. A precision skin diagnosis device in a private diagnosis room

    Precision diagnosis

    In a private diagnosis room the whole face is photographed, recording even skin conditions that are hard to see with the eye.

  2. Co-Director Dr. Lee Dong Hun explaining skin analysis results on a screen

    Skin analysis

    The doctor goes through your pore, pigmentation, wrinkle and firmness results with you on screen and explains what comes first.

  3. Co-Director Dr. Lee Jae Min reviewing diagnosis results one-to-one with a visitor

    One-to-one design

    With your skin, the balance of your face, the change you want and your schedule in view, you decide the treatment and its extent together.

  4. Co-Director Dr. Lee Jae Min performing a lifting treatment in person

    Treatment by your doctor

    The doctor who consulted you performs the treatment from start to finish in a private treatment room. No one takes over halfway.

Co-Director Dr. Lee Dong Hun performing a treatment in person

“I take injection pain seriously.”

Co-Director Dr. Lee Dong Hun

Many people hesitate over injection treatments because they hurt. So we went back over everything, from the anesthetic to the products used.

  • Careful numbing, unhurried timingWe allow plenty of time for a special numbing cream to take full effect, and add anesthetic injections for the treatments and areas that need them.
  • Fine needles, finished quicklyInjection treatments use fine needles, and the doctor finishes them personally in a short time, adjusting along the way by watching how you are doing.
  • Even the product formulation countsThe same treatment can feel more or less demanding depending on the product, so we take that into account too.

The anesthetic method and whether it is used are decided after an examination, according to the treatment, the area and your condition. How much it hurts varies from person to person.

Aftercare and Side Effects

After the procedure, managing swelling and bruising comes first. To reduce bleeding and bruising, you may be advised to avoid aspirin-containing products for 7 days before the procedure.

  1. Patient holding a cold pack wrapped in a towel to the cheek while consulting a doctor
    Cold compress For the first 1–2 days, apply cold compresses to reduce swelling. Wrap the cold pack so it doesn't touch the skin directly.
  2. Patient massaging cheek with fingertips in front of a mirror while doctor sits nearby
    Massage Gently massage the injection site once a day for 5 days. Do not press hard or rub.
  3. Man in dark clothes and white coat sitting, woman in comfortable clothes sitting on sofa
    Adjust daily activities Avoid strenuous exercise and alcohol for 24 hours on the day of the procedure. Avoid places with prolonged heat exposure like saunas on the same day.
  4. Doctor in white coat and gloves examining patient's cheek
    Follow-up Check whether swelling, bruising, and pain are decreasing. If bruising spreads or swelling worsens on one side, take photos and show them during consultation.

Common reactions are swelling, bruising, tenderness, and pain. There may be bleeding at the needle entry site. Less commonly, itching, rash, skin discoloration, and allergic reactions may occur.

People with bee venom allergy are excluded from the procedure due to anaphylaxis risk. If swelling and pain do not decrease after a few days, or if rash and itching spread, or if a severe allergic reaction occurs, do not wait and seek medical care.

Buying unapproved injectable products online and self-injecting is a dangerous method warned against by the FDA. FDA states that permanent scarring, serious infections, and skin deformities have been reported in people who received unapproved fat-dissolving injections.

Frequently Asked Questions

Is hyalase injection very painful?

Pain mainly comes from the needle prick and the pressure as the drug spreads. Thin, sensitive areas like the lips may feel more even with the same needle. Numbing cream reduces discomfort, but because it's an injection, some sensation remains. The degree of pain depends on the injection volume and depth, and individual pain threshold. If you're very nervous before the procedure, mention it during consultation to adjust the anesthesia plan.

Does numbing cream eliminate pain?

Numbing cream is used to reduce needle pain. When dissolving lips, applying numbing cream is advised. However, it doesn't completely eliminate the pressure as the drug spreads. The application time and area, and needle thickness are determined during consultation. If it's hard to endure even with numbing cream, tell us before the procedure.

Is dissolving lip filler more painful than nose?

It's hard to say which is more painful. The lips have thin and sensitive tissue, so the injection sensation can feel intense. Around the nose, the sensation varies with the depth of filler and swelling status. The area of numbing cream application and injection volume also affect pain. Asking about the anesthesia plan for each area and expected discomfort during consultation can help your decision.

How long do swelling and bruising last after hyalase?

Swelling, bruising, and tenderness often subside within a few days. Complete results can take up to 2 weeks. Cold compresses help for the first 1–2 days, and massaging the injection site once a day for 5 days may be advised. If bruising persists or swelling doesn't decrease, seek medical care. Avoiding aspirin-containing products before the procedure helps reduce bleeding and bruising.

How should I choose a clinic for filler dissolving consultation?

Check whether they explain that hyalase acts only on hyaluronic acid filler. Also check whether they ask about bee venom allergy, medications, and reactions to previous procedures. See if they specifically guide anesthesia method, procedure time, and response to swelling, bruising, and allergies. A place that explains the limitations of partial dissolving and timing for retreatment is helpful for consultation. It's better to look at whether diagnosis and follow-up guidance are in place rather than just equipment or price.

At a Glance

Table 2 At a Glance
Item Key Point
Target Hyaluronic acid filler
Pain Needle prick and pressure as drug spreads, lips more sensitive
Anesthesia Numbing cream reduces discomfort, not completely painless
Time 10–15 minutes
Sessions Usually 1–2, larger amounts or lumps may take longer
After procedure Cold compress 1–2 days, massage 5 days, observe swelling and bruising