If you are considering a non-surgical injectable treatment for a small, localised pocket of fat — fullness under the chin is a commonly discussed example, and among the concerns covered under jawline and chin contouring — a sensible question to ask before deciding is what recovery involves, and how much swelling to expect. This article is general education about recovery and aftercare; it is not a recommendation to have any treatment. Whether a treatment is appropriate for you, and its benefits, limitations and risks, is something only a qualified practitioner can assess at an individual consultation. Recovery experiences vary considerably from person to person.
Some injectable treatments for localised fat use medicines that are prescription-only, so by law we can’t name specific brands, products or quantities in public information — these are discussed with you at your consultation.
After treatment, you may have swelling, which commonly lasts somewhere between three and seven days, although this differs significantly between individuals. Swelling is typically most noticeable within the first 48 to 72 hours. How much you experience depends on several factors, such as the size of the treated area and the number of injections. Individual results and recovery vary. While many people feel comfortable returning to their usual activities within one to two days, some prefer to take a short break until the initial swelling has improved. Cold compresses and carefully following the aftercare instructions from your practitioner may help you manage discomfort and support recovery.
Recovery at a glance
- Swelling tends to peak within the first three days and gradually improves over about a week.
- Many people resume normal activities within roughly 48 hours of treatment, though this varies.
- Cold compresses and proper aftercare may help manage swelling and support recovery.
What these treatments involve
Injectable treatments for localised fat are carried out as a series of small injections into a targeted area. The body then processes the treated area gradually, usually over several weeks, largely via the lymphatic system, so any change is noticed slowly rather than immediately. A mild inflammatory response at the injection site — including some swelling — is a normal part of this process. Because the medicines that may be used are prescription-only, they are not named here. For more on how these treatments are used and assessed, see our guide, A Guide to Non-Surgical Treatments for Localised Fat.
These treatments generally relate to small, localised deposits that have not responded to changes in diet and regular exercise, rather than larger volumes of fat, and they are not a weight-loss method.
Side effects and recommended aftercare
Injectable treatments for localised fat can cause temporary changes in the treated area, so careful attention to aftercare is important.
Common side effects
Temporary swelling, redness and tenderness in the treated area commonly occur and generally settle within three to seven days, with swelling usually peaking by the second or third day. You might also have mild bruising, which typically resolves within about two weeks. Some people report warmth, tightness, mild itching or increased skin sensitivity; these are usually short-lived, typically easing within a week. More serious reactions are uncommon but possible — see below.
Recommended aftercare measures
Applying a cold compress to the treated area for 10 to 15 minutes several times a day during the first 48 hours may help manage swelling and discomfort. Paracetamol may be used if needed for discomfort or tenderness, but aspirin and other blood-thinning medications should be avoided unless your healthcare provider advises otherwise. Keep the treated area clean and avoid unnecessary touching during the first 24 hours. Staying hydrated and eating well supports your body’s natural healing.
Minimising potential complications
Avoid strenuous activity for at least 48 hours after treatment, though gentle walking is usually fine. Makeup and skincare products should not be applied to the treated area for 24 hours, to reduce the risk of complications. Be alert for rare but serious reactions, including severe swelling, intense redness, difficulty breathing or excessive itching; if any of these occur, contact your healthcare provider immediately. Following the post-treatment instructions from your clinician is important, and you should arrange a follow-up promptly if you have any concerns about your recovery.
Results and follow-up
Any change from these treatments is gradual. It is usually noticed over a period of weeks rather than immediately, and individual experiences vary.
What to expect over time
You may begin to notice a change from around the second or third week, as the body continues to process the treated area. Changes commonly develop over the following weeks, as the swelling settles. The degree of change differs from person to person and cannot be guaranteed. Depending on the area and how you respond, more than one session may be recommended, spaced several weeks apart. Your practitioner may take photographs to help monitor your progress during follow-up appointments.
Maintaining any change
Maintaining any change typically involves a balanced diet and regular physical activity. Some people choose additional sessions later on; your clinician can advise whether further treatment may be helpful based on your individual progress. Longer-term outcomes depend significantly on lifestyle, as weight gain can affect untreated areas.
Lifestyle recommendations after treatment
Good self-care after treatment helps you manage swelling and supports recovery, and your everyday activities can influence how you heal.
Activities to temporarily avoid
Refrain from strenuous exercise for about five to seven days after treatment, as strenuous activity may increase swelling. Avoid swimming pools, saunas and hot spas during the first week to reduce infection risk. Try not to touch or massage any small lumps that might form, as these generally settle on their own within two to three weeks. It is also sensible to avoid alcohol for about 48 hours after treatment to help limit swelling and bruising.
Tips for recovery
Cold compresses applied several times a day can help reduce swelling and discomfort. Staying well hydrated — around two to three litres of water a day — supports natural healing. Sleeping with your head slightly elevated during the first few nights may help reduce fluid build-up and morning swelling. Temporary numbness in the treated area can occur but generally resolves within two to four weeks as the area heals. Always contact your healthcare provider promptly if you notice anything unusual, such as signs of an allergic reaction or infection.
Talk to us
Understanding aftercare is an important part of recovery. At MedAesthetics, our experienced clinical team aims to give you clear, individual guidance on managing swelling, minimising side effects and supporting your recovery. Recovery experiences vary between individuals. To arrange an assessment and discuss what to expect, contact us.
