How Is a Steroid Dent Repaired? Ultrasound-Guided Fat Grafting, Restoring the Loss Layer by Layer

A patient pulled out her phone and showed me photo after photo: "Doctor, this is before my scar shot, this is after it caved in, this is the laser I had afterwards, the cream I used, and the saline I went back for several times… and look, the dent is still right here."

She'd tried plenty, spent plenty, and the dent had barely moved. She asked me, "Can this kind of dent even be filled — and how?"

That's what this article is about: why a steroid dent so often gets treated in the wrong place, and how I actually repair it, step by step.

Before filling, the first step isn't injecting fat — it's seeing clearly

A lot of people think repairing a dent is "fill wherever it's sunken," injecting something straight in. But a steroid dent, filled without first seeing clearly, easily ends up in the wrong layer, uneven, or even risky.

So in my clinic, there's one thing I always do before filling: look at that dent carefully with high-frequency ultrasound. Look at what? Which layer the dent is in — epidermis, dermis, or subcutaneous fat — and how deep; how much fat is left underneath and what the fibrosis looks like; and where the vessels run. Once that "dent map of your particular face" is drawn, I know which layer to fill, how much, and how to stay away from vessels.

Why a steroid dent has to be looked at this way comes down to how it does its damage — it's often a full-thickness atrophy where epidermis, dermis and subcutaneous fat are all thinned, not a surface-layer thing. Filling without seeing clearly is like acting with your eyes closed in a spot that's already thinned.

Why mainly autologous fat, and not filler?

Once ultrasound confirms a block is genuinely missing in the deep layer, to restore that volume, what I mainly use is your own fat.

Here's why: autologous fat is your own tissue, carrying growth factors, so filling a spot that lost volume and circulation does more than add volume — it helps improve the tissue environment there, and over the long run it lasts longer and feels more natural. Hyaluronic acid can prop up volume temporarily, but it's metabolised away, and injected into already-thinned tissue it tends to show through.

What about collagen stimulators? Let me be clear about my stance. Collagen stimulators, injected poorly, are prone to lumping and can't be dissolved — they're exactly the sort of thing I spend a lot of time removing for people. So in repairing a steroid dent, they're not my mainstay. Only when the dermis is thinned and they can be placed precisely into the dermis under ultrasound guidance would I consider them cautiously — never "it's sunken, so inject a load of stimulator on top." The mainstay is always autologous fat plus ultrasound precision.

What does "reverse, precise fat grafting" mean?

The hard part of fat grafting isn't getting the fat in — it's filling it right.

I often call this reverse, precise fat grafting. The idea: steroid thins the tissue from the surface downward, layer by layer; so to repair it, I have to work in reverse — first know how much each layer has lost, then restore the volume precisely, layer by layer, from the right depth. Fill the thin layer where it's thin, in the amount it needs, kept smooth — not just injecting one big blob of fat regardless, so the surface looks raised but the layers underneath are still a mess.

Whether it ends up overfilled, uneven, or lumpy comes down to exactly this: whether the layers were seen clearly first, and whether the fill followed those layers.

A full-thickness dent needs layered filling, not a blob on top

Building on that point. A steroid dent is often full-thickness — the epidermis has thinned, the dermis has collapsed, and a block of subcutaneous fat is gone.

If you treat this kind of full-thickness dent as simply "one block of missing volume" and fill it in one big lump, the surface might be level for a short while, but the layers don't match, and it easily overfills and turns uneven later. My approach is to follow what the ultrasound shows and handle the amount for each depth separately — where the deep layer lost more, fill a bit more; the thinned superficial layer is addressed on its own — bringing each layer back closer to its original thickness. That's what makes the result smooth and natural, not one lump.

This layered approach is not limited to the face. When an elbow or a joint is left sunken by a scar-reducing or keloid injection, the logic is the same; only the layer thickness and the amount of movement differ. I have written up a real elbow case in what to do about a dent after a scar-reducing injection.

Safety: ultrasound guidance throughout, staying away from vessels

There's one more thing I always stress: safety.

A spot that has already sunken and been thinned by steroid isn't like normal skin, and the vessels there may have been pulled out of position. If fat is blindly injected by feel here and it goes into a vessel, there's a risk of vascular occlusion and local skin death — on the face, that's a serious complication. The value of ultrasound guidance is that while I'm filling, I can see in real time where the vessels are and which layer the needle is in, filling as I watch, keeping that risk as low as possible.

I've written about the cases where a filler lump was blindly injected with steroid and the normal fat atrophied and sank along with it, in What to do about skin atrophy and depression after steroid for a lump — whether it's the shot that caused the dent or the one that repairs it, "see it first, then act" is the same principle.

How much can be restored? I'll draw the boundary honestly

Finally, expectations — something I always make clear before treating.

Fat grafting to repair a steroid dent is meaningful improvement, not a guarantee of filling the dent back to exactly how it was. How much can be restored depends on which layer the dent is in, how large it is, how much fibrosis there is, and whether important structures are nearby. Also, once autologous fat is injected, some of it is reabsorbed, and how much survives varies from person to person — so sometimes it takes more than one session to reach a stable result.

I go through all of this, based on what the ultrasound shows, before treating: how far we can get, roughly how many sessions, where the risks are. I'd rather put it plainly up front than oversell the result to get you to decide on treatment.

Common questions

Does repairing a steroid dent with autologous fat last?

Autologous fat is your own tissue, and the portion that survives is long-term, so it's relatively lasting. But some of it is reabsorbed after injection, and how much survives varies from person to person, so sometimes it takes more than one session to reach a stable result. Directionally, that's more lasting than a temporary filler like hyaluronic acid, which is metabolised away.

Why not just inject hyaluronic acid or a collagen stimulator?

Hyaluronic acid can prop up volume temporarily but is metabolised away, and shows through thinned tissue; collagen stimulators, injected poorly, are prone to lumping and can't be dissolved — exactly the sort of thing I often remove for people. So for repairing a steroid dent, my mainstay is autologous fat; I'd only consider a stimulator cautiously where the dermis is thinned and it can be placed precisely under ultrasound — not as the mainstay.

Does fat grafting have to use ultrasound? Can't it be done by experience?

A spot that has sunken has thinned tissue and vessels that may have shifted position; blindly injecting by feel carries a risk of injecting into a vessel — occlusion or tissue death — and easily fills the wrong layer. Ultrasound guidance lets me see the layers and vessels in real time, filling as I watch, for precision and for safety.

Will one session fix it?

It depends on severity. A small dent that hasn't lost much has a chance of clear improvement in one session; a large dent with heavy fibrosis may need more than one, because some of the fat is reabsorbed. I'll estimate the number for you before treating, based on what the ultrasound shows.

Finally

Back to the patient scrolling through her phone. The lasers, creams and saline she'd tried were all treating the surface — but her dent was a block genuinely missing in the deep layer. The direction didn't match, so no wonder it wouldn't fill.

I scanned it on ultrasound, mapped which layer was sunken and how much was gone, and told her: this can be restored with your own fat, layer by layer, following what we see — I'll make clear up front how far we can get, and it may take more than one session. She let out a breath and said, "So it's not hopeless — I'd just been filling the wrong place all along."

If you're also stuck at "tried everything, the dent's still there," start with an online consultation. We'll use ultrasound to see which kind of dent yours is and whether fat grafting can address it, and decide together.

(If your dent hasn't happened yet and you're weighing whether a filler lump should get a steroid shot at all, that's a before-you-inject decision — which materials are reversible, and when not to inject at all: see Should a filler lump get a steroid shot? The material decides what's reversible on our filler-revision specialty site. This article is about repairing damage already done.)

Related specialties

• Steroid injection atrophy & depression repair
• Autologous fat repair