Dr. Chang Min KangDirector, UVOM Plastic Surgery
English edition

concerns

The vocabulary of this problem is not medical. People say the area feels tight, that a lump came up years after the injection, that the swelling returns every time they catch a cold. Those descriptions are useful and they are where an examination begins. Ten of them are taken in turn below. Several describe the same underlying situation from different angles, and more than one may apply to the same face.

Most of the questions on this page are settled by establishing which layer the material occupies and what runs beside it.

01A lump under my eye that will not settle

What it usually is

Most often it is injected material that is still there. Hyaluronic acid under the lower lid can persist well past its stated duration, and semi-permanent and permanent products longer again. Grafted fat can survive as a firm collection. Prolapsed orbital fat and a swollen lymphatic channel produce a similar silhouette from outside.

What answers it

Ultrasound, with the examining hand still on the face. It shows which layer the swelling occupies, whether it is a discrete deposit or a sheet, whether fluid is present, and how it sits in relation to the orbital rim and to normal fat. Where the history points to hyaluronic acid, the response to an enzyme injection adds a further piece of evidence.

What it is not

It is not automatically filler, and it is not automatically fat. It is also not in itself a reason to operate: material that produces no symptom and lies away from the lid margin is sometimes better left where it is. It is never something that can be settled from a photograph.

02Swelling that comes and goes when I am ill or after dental work

What it usually is

Usually a delayed inflammatory reaction around material that has been in place for months or years. Triggers described in the published literature include influenza-like and other upper respiratory infections, dental treatment, vaccination, facial trauma, and further injection into a site that already contains material.

What answers it

The history first: what happened in the two or three weeks before each episode, and how long each one lasted. Then examination and ultrasound, with Doppler to show whether flow around the material has increased, which separates an active process from a quiet deposit. Where fluid is present, aspiration and culture distinguish inflammation from infection.

What it is not

It is not proof that the material is infected, and it is not proof that the dental work caused anything. These are associations reported in case series rather than established causes, and most people carrying injected material have a filling or an influenza without any reaction at all. It is also not a state to operate in while it is active.

03My skin has gone lumpy months after an injection

What it usually is

Material that has spread unevenly, was placed too superficially, or has provoked fibrosis around itself. Over-grafted fat can harden or calcify. What is felt is usually a mixture of the substance and the tissue the body has built around it, which is why the lump is often firmer than the product ever was.

What answers it

Examination of the plane: whether the irregularity moves with the skin or with the layer beneath it. Ultrasound for depth and extent, because the palpable part of a deposit is frequently the small end of a sheet reaching further than the fingers suggest. The dates and the number of previous sessions, since more than one material may be present.

What it is not

It is not scarring from the needle, in most cases. It is not necessarily permanent. And it is not a reason to remove everything that can be found: removal is directed at what is producing the complaint, because taking normal fat out with the material leaves hollowing that is harder to correct than the lumpiness was.

04A hard band along my jaw

What it usually is

Several different things are described in these words. A thread, and the fibrous track it leaves behind, run in a line and are felt as a cord. Filler placed along the mandible can firm up. A band that tightens on speaking is muscle rather than material. Descent of the soft tissue in front of the chin produces a ridge that reads as a band.

What answers it

Whether it is linear or a mass, whether it changes when the face moves, and what it looks like on ultrasound, where an intact thread appears as a fine bright line and a fibrous track does not. The history of thread lifting and of filler along the jaw, with dates, usually settles the rest.

What it is not

It is not necessarily the thread itself. An absorbable thread may have broken down while the reaction it provoked has not, and what is felt then is the track rather than the material. Removal along the jawline is not a minor procedure done in a chair: the marginal mandibular branch of the facial nerve runs close by, and the plane is kept deliberately deep because of it.

05Redness that keeps coming back in the same spot

What it usually is

A reaction to something beneath the skin that flares and settles. Recurrence in one fixed place points to a fixed cause in that place, and that cause is usually material. Thin skin over a superficial deposit also reddens more readily than skin elsewhere.

What answers it

The pattern over time: how quickly each episode comes on, how long it lasts, what preceded it, and whether antibiotics changed anything. Examination for warmth and tenderness, ultrasound for fluid and for increased flow, and aspiration with culture where fluid is found.

What it is not

It is not always infection. Infection tends to worsen from one day to the next, with warmth, tenderness and sometimes fever, and usually improves on antibiotics. A delayed inflammatory nodule waxes and wanes over weeks and responds incompletely or not at all. The two can occur together, which is why the question is settled by examination rather than by another course of tablets.

06My cheek looks heavier than it used to

What it usually is

Descent, added volume, or both together. Material injected into the cheek adds weight to tissue whose support is already loosening. After contouring surgery the soft tissue does not always follow the bone. And the cheek that looks heavy is often the one whose support has given way rather than the one that has gained bulk.

What answers it

Separating the findings before combining them. Ultrasound for injected material, meaning where it is, how deep and how far it reaches. CT where bone has been operated on before, or where the position of the malar complex is part of the question. Examination sitting upright for where the tissue has descended to, and a note of what the face does when it moves.

What it is not

It is not one problem with one answer. Bone position, injected material and descent can all be present in the same cheek, and the treatments for them are not interchangeable. Taking material out of a cheek that has descended will not lift it, and lifting a cheek full of material does not address the material.

07An area that feels numb, or tight

What it usually is

Scar, in most cases. Tissue that has been injected, inflamed or operated on becomes bound to the layers around it, and a bound layer feels tight. Numbness reflects a sensory nerve that has been stretched, compressed within scar or injured, most often the infraorbital nerve in the mid-cheek, or the supraorbital and supratrochlear nerves in the forehead.

What answers it

Mapping the numb area against the territory of a named nerve, which usually identifies which one is involved. The interval since the injection or the operation matters, because sensation that is slowly returning behaves differently from sensation unchanged for a year. Ultrasound shows whether material lies along the nerve’s course.

What it is not

It is not proof that a nerve has been cut. Pressure and traction produce the same symptom and often recover slowly. Tightness is not evidence that the material is growing. Neither symptom on its own decides whether an operation should happen, though both change how one would be planned, since a nerve already caught in scar is approached differently.

08A nodule that appeared years after the treatment

What it usually is

A foreign body granuloma, or a delayed inflammatory nodule. Cells gather at material the body can neither break down nor ignore, and collagen is laid down around the whole. The result is a firm mass made partly of the original substance and partly of tissue that was not there before.

What answers it

Ultrasound for the plane, the borders, fluid and flow. The history of what was injected and when, and of anything that happened in the weeks before the nodule appeared. Biopsy where the nature of the tissue reaction is still unclear after imaging.

What it is not

It is not a sign that something was injected recently. The process is cumulative, and nothing detectable has to have happened on the day the lump was noticed. A person can be entirely accurate in saying they had no trouble for five years and still be describing a reaction to something injected five years ago.

09A bluish shadow under my eye

What it usually is

Where filler was placed, this is usually the Tyndall effect. A gel sitting shallow beneath thin translucent skin scatters light and reads as blue or grey rather than as a flesh-coloured ridge. The lower lid has the thinnest skin on the face, so it appears here more than anywhere else.

What answers it

Examination in different lighting, and ultrasound for depth, since the finding is about how shallow the material sits rather than how much of it there is. Where hyaluronic acid is likely on the history, the response to an enzyme is informative.

What it is not

It is not a bruise, and it does not fade with time, because nothing about the depth of the material changes on its own. It is also not the same complaint as darkness from pigmentation, or the shadow cast by a hollow below the orbital rim. Those look similar at conversational distance and are not treated in the same way.

10Something was injected and nobody can tell me what

What it usually is

This is the ordinary starting position for a removal rather than an unusual one. Clinics close. Records were never handed over. The word filler covered several different materials, and more than one of them may have gone into the same cheek on different days.

What answers it

The four questions that change the plan can be answered without a product name: which layer the material occupies, how far it reaches, what it is attached to, and what the tissue around it has become. Examination and ultrasound answer those. CT is added where bone is in question, and biopsy where the tissue reaction itself stays unclear.

What it is not

It is not an obstacle to treatment, and it is not a reason to guess. Imaging shows how a material behaves rather than what it is called, and several unrelated substances look alike on a screen. A trade name is occasionally recoverable and rarely alters the operation. Where the material sits, and what runs beside it, alters all of it.

This page names possibilities. It does not diagnose. The same description covers several different findings, and which one applies is settled in the room, with a probe on the area and the history in front of you, rather than from a photograph or an account given over the telephone. What is written here as clinic practice is the clinic’s stated protocol and is confirmed at consultation.

Where a complaint here matches yours, the longer accounts are set out under the pages on knowing what is in there, on materials and regions, and on how much comes out. They are written for the same reader and they go further than this page does.

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