Hyaluronic Acid in the Face: Side Effects

Before getting hyaluronic acid, it's reasonable to want to know exactly what to expect in the days that follow. The good news is that hyaluronic acid already exists within your body, mainly in the skin and joints. This is why the body recognises it as its own material, which makes it one of the safest injectables in aesthetic medicine.

This doesn't mean there are no side effects. There are, but most are mild, expected, and pass quickly. The key is knowing what is considered a normal reaction and when it's worth calling your doctor.

Common Side Effects (Mild and Temporary)

These aren't really "complications". They are simply how your body reacts to the needle and the new material.

Swelling (oedema): The most common one. It appears immediately after the injection and often peaks the following day. It gradually subsides within a few days, although in sensitive areas such as the lips or around the eyes it may last a little longer.
Small bruises (ecchymoses): These appear when the needle touches a small blood vessel. They are easily covered with make-up and disappear on their own.
Redness and sensitivity: The area may appear red or give a feeling of warmth and "tightness" in the first few hours, until the material settles into the tissues.

In most cases, these reactions subside within 2 to 14 days. Ice (wrapped in a cloth, never applied directly to the skin), keeping your head elevated when lying down, and avoiding intense exercise and heat help them resolve more quickly.

Rare Complications

These are the cases that require medical attention. They are rare, but it's good to be aware of them.

Allergic reaction: Rare, since hyaluronic acid is biocompatible. When it occurs, it is usually due to one of the other ingredients in the formulation rather than the hyaluronic acid itself.
Asymmetry or overcorrection: When the result appears uneven or with more volume than desired. The good news is that it can be corrected: the doctor uses an enzyme, hyaluronidase, which breaks down the material and restores the area.
Granulomas (nodules): Small hard lumps under the skin, which may appear as the body's reaction to a foreign substance.
Vascular occlusion: The most serious and the rarest. It occurs when the material accidentally enters an artery and blocks blood flow. It causes intense pain, an unusual skin colour, and requires immediate treatment.

How to Reduce the Risk

The biggest difference between a smooth treatment and a complication lies in the doctor's experience. Choose a specialised physician who has thorough knowledge of facial anatomy, knows where the blood vessels run, and uses certified materials.

Before the treatment, inform your doctor about any medications you take (especially anticoagulants or anti-inflammatories) and about any history of allergies.

When to Contact Your Doctor

There's no need to worry about the expected swelling. However, you do need to contact your doctor immediately if you notice:

Intense, disproportionate pain that worsens
Redness that spreads or a change in skin colour
Swelling that does not subside after two weeks
Signs of infection, such as warmth and pus

These are the signs that distinguish a normal reaction from something that requires medical intervention.

Frequently Asked Questions

Is hyaluronic acid in the face dangerous?

When the treatment is performed by a specialised doctor, it is considered one of the safest aesthetic treatments. Serious complications are rare and are mainly associated with incorrect technique or uncertified materials.

How long do the side effects last?

Mild side effects, such as swelling and redness, usually subside within 2 to 5 days. Small bruises may take up to 10-14 days.

Can the hyaluronic acid be removed if I don't like it?

Yes. Hyaluronidase breaks down the material and restores the area, so the result is not permanent.

Conclusion

The side effects from hyaluronic acid in the face are, in the overwhelming majority of cases, mild and temporary. A little swelling, perhaps a bruise, a little redness, and then the result you were hoping for. Serious complications do exist, but they are rare and are avoided when you choose the right doctor and material.

If you'd like to discuss what suits your own face, the Facemed Clinic team can guide you.