Dermal Filler Aftercare the first 48 hours

The consultation ends when the client walks out of the door, but the result is decided over the next two days. However good your injecting technique is, the first 48 hours after a dermal filler treatment do a huge amount of the work in determining whether a client is delighted or disappointed. Swelling settles, product integrates, and the tissue begins to calm. What your client does, or does not do, in that window has a direct effect on comfort, on how the filler beds in, and on your ability to spot a problem early.

This informative article is aimed at UK practitioners, clinic owners and aesthetics business owners who want a clear, defensible aftercare standard for the immediate post-treatment period. It goes over what to tell clients, what to document, why the advice matters clinically, and how it fits with the direction of UK regulations. Whether you are working with hyaluronic acid fillers, skin boosters or polynucleotides, the principles below hold.

Why the First 48 Hours Matter

Dermal fillers, the majority of which in the UK are cross-linked hyaluronic acid, are injected into or beneath the skin to add volume, restore contour or hydrate. Immediately after injection the tissue is disrupted. There is a small wound at every entry point, localised trauma, and an inflammatory response that produces the swelling, redness and occasional bruising clients expect. Product also needs time to settle into its final position and, in the case of hyaluronic acid, to draw in water and reach its finished volume.

During this early phase the treated area is more vulnerable than clients realise. Heat, pressure, vigorous exercise and certain products can worsen swelling, encourage bruising or, at worst, contribute to migration or infection. Just as importantly, the first 48 hours are when the rare but serious complications, such as vascular occlusion or the early signs of infection, are most likely to declare themselves. Good aftercare is therefore not simply about a nice result. It is a patient safety measure and a core part of your duty of care.

Aftercare is not an optional courtesy at the end of a treatment. It is part of the clinical process, and increasingly part of what a compliant, professional service is expected to look like.

Who This Applies To

This advice applies to any practitioner administering injectable dermal fillers in the UK, and to the clinics and business owners who employ them. It is equally relevant whether you are a nurse, a doctor, a dentist or a non-medical practitioner working to professional standards.

It is worth remembering the wider legal backdrop. Since 1 October 2021 it has been a criminal offence in England, under the Botulinum Toxin and Cosmetic Fillers (Children) Act 2021, to administer botulinum toxin or cosmetic fillers by injection to anyone under 18 for a cosmetic purpose, and to arrange or book such treatment. Aftercare only ever comes into play for eligible adult clients who have given informed consent.

The regulatory picture is also shifting. The Government has been developing a licensing scheme for non-surgical cosmetic procedures in England under powers in the Health and Care Act 2022, using a risk-based green, amber and red model. Facial dermal fillers are expected to fall into the amber category, meaning medium risk with additional oversight requirements. Scotland has moved faster, having passed the Non-surgical Procedures and Functions of Medical Reviewers (Scotland) Bill at Stage 3 in March 2026. None of this is fully in force across the whole UK yet, but the direction of travel is clear: more formal standards, better record keeping, and a stronger expectation that practitioners can evidence safe practice, including aftercare.

What to Give Every Client Before They Leave

Verbal advice on its own is not enough. Every client should leave with written aftercare instructions, ideally branded and specific to the treatment they have had. This protects the client and protects you. If a concern arises later, a clear written record of the advice given is a valuable part of your documentation.

Your aftercare handout should include, as a minimum:

• A plain-English summary of what to do and what to avoid in the first 24 to 48 hours.
• What is normal, such as mild swelling, redness, tenderness and small bruises.
• Clear warning signs that require urgent contact.
• A direct contact number for the practitioner or clinic, and what to do out of hours.
• The date of treatment, product used and any batch details, kept on file for traceability.

The First 24 Hours: What Clients Should Avoid

The advice below reflects widely accepted UK aesthetic practice for hyaluronic acid dermal fillers. Ask clients to follow these points closely for the first day, and to ease back into normal activity over the following 24 hours.

• Avoid touching, pressing or massaging the treated area unless you have specifically instructed otherwise. Unnecessary pressure can move product before it settles and introduces infection risk from unwashed hands.
• Avoid strenuous exercise for at least 24 to 48 hours. Raised blood pressure and body temperature can increase swelling and bruising.
• Avoid heat. No saunas, steam rooms, hot yoga, sunbeds or very hot baths. Heat worsens inflammation and swelling.
• Avoid alcohol for the first 24 hours. Alcohol is a vasodilator and can make bruising and swelling worse.
• Avoid make-up over the injection sites for the rest of the day to reduce infection risk while the entry points close.
• Avoid facials, chemical peels, laser or other facial treatments for at least two weeks, and never on the same day.
• Avoid sleeping face down on the first night where possible, to reduce pressure on the treated area.
• Avoid dental work where non-urgent, for around two weeks after facial filler, as it can disturb the product.

What Clients Can Do to Help Recovery

Reassurance matters as much as restriction. Clients respond well when they know there are positive steps they can take.

• Apply a cool compress gently over clothing or a clean cloth if there is swelling, avoiding direct pressure and ice straight onto the skin.
• Stay upright for the first few hours after treatment.
• Keep well hydrated and eat normally.
• Take paracetamol for any discomfort if suitable for them, and avoid anti-inflammatory painkillers unless a prescriber has advised otherwise, as some can increase bruising.
• Sleep slightly elevated on the first night to help swelling settle.