Getting a BBL After Butt Injections: Fillers, Sculptra and Biopolymers

If you've had anything injected into your buttocks before, whether a clinic filler, a "butt shot" at a party or a spa, or a product someone told you was natural, your surgeon needs to know before they plan a BBL. Past injections can change what's safe, what's possible and what the operation actually involves. In some cases the right answer is a different surgery first; in others, it's no surgery.

This guide explains the main kinds of buttock injections patients have had, why each one matters for fat transfer, what imaging and records to gather, and how a quote should change when there's injection history. It's not a diagnosis. Only a surgeon who examines you, ideally with imaging, can tell you what's in your tissue and what to do about it.

Why injection history changes a BBL plan

A BBL moves your own fat into the buttock. The fat needs healthy, well-supplied tissue to survive, and the surgeon needs to know what's already in the space they're working in. Previous injections can affect this in several ways:

• Scarring and capsules. Some substances cause the body to wall them off with scar tissue, which can make the area firm, lumpy and poorly supplied with blood.
• Unknown location. Product injected without imaging can sit at different depths, including in or near muscle. Your surgeon needs to know where it is before placing anything near it.
• Ongoing inflammation. Some permanent substances can trigger chronic inflammation, pain, skin changes or immune reactions years after injection.
• Altered results. Even a dissolvable filler can change the shape your surgeon is working with, which affects how much fat they plan to transfer and where.

Since modern BBL safety guidance focuses on placing fat only above the muscle, in the subcutaneous layer, knowing exactly what's already in that layer matters. Our explainer on subcutaneous-only BBL covers why that plane matters.

The main types of buttock injections, and what each means

Biopolymers and silicone: the case that needs the most caution

In Colombia, the word biopolímeros (biopolymers) is used broadly for non-approved permanent substances injected for body shaping, including industrial silicone and oils. They're a well-known public health problem here, and Colombian doctors see many patients with complications from them. In 2023 Colombia passed Ley 2316, which made injecting non-permitted modeling substances into another person a criminal offense and called for protocols for the conditions they cause. That law is a signal of how seriously the problem is taken locally.

The medical term often used in Latin America for the reaction these substances cause is alogenosis iatrogénica (iatrogenic allogenosis, meaning disease caused by a foreign substance introduced through treatment). Symptoms reported include pain, hardening, redness, skin discoloration, lumps and, in some patients, symptoms elsewhere in the body. They can appear years after the injection.

What surgeons may suggest instead

If imaging shows a permanent substance, the conversation may shift from "BBL" to "what can be safely removed, and what can't." Removal surgery for these materials is its own specialty, can involve significant tissue loss and may need more than one operation. Some surgeons will discuss reconstruction with fat later, once the tissue has healed; others won't. Get your plan from a board-certified plastic surgeon who does this kind of work regularly and ask directly how many of these cases they've managed. Our checklist on verifying a BBL surgeon in Colombia applies here twice over.

Gather your records before the consultation

The more your surgeon knows before you fly, the less likely you are to arrive and find out the plan has changed. Collect what you can:

• Dates and number of sessions for each injection, even approximate.
• The product name from receipts, consent forms, box labels or messages with the provider.
• Who injected it and where. A licensed clinic, a medical spa, a home or a party matters for what the substance might be.
• Any complications since: lumps, pain, redness, infections, antibiotics or drainage procedures.
• Photos of the area now, taken the way your clinic asks. Our guide to consultation photos covers lighting and angles.
• Any imaging you already have (ultrasound or MRI reports and images).

If you truly don't know what was injected, say so plainly. "I don't know" is useful information for a surgeon; a guess presented as fact can send the plan in the wrong direction.

Imaging: ask what they want and where to get it

Surgeons commonly use ultrasound to look at the soft tissue of the buttock, and MRI may be requested when a permanent substance is suspected or the picture is unclear. Ask your surgeon which they want, whether a scan done at home is acceptable, and whether they want the images or only the radiologist's report. If imaging will be done in Medellín on arrival, ask what happens to your surgery date if it shows something unexpected.

What your quote should look like with an injection history

A standard BBL package assumes a standard BBL. If you have injection history, push for a quote that reflects your case. It should clearly answer:

1. What's the plan if imaging shows something? Is surgery postponed, changed or cancelled, and what happens to your deposit?
2. Is removal included, separate or not offered? If the surgeon plans to remove material, is that a separate operation and a separate fee?
3. Is fat going into the same area as the old product? Ask where the fat will and won't be placed.
4. Is pathology included? If tissue is removed, ask whether it will be sent to a lab and whether you'll get the report.
5. How does follow-up change? Recovery after removal can be longer. Ask how many days in Medellín they want, and how they handle problems once you're home.

If a clinic gives you the same package price and the same length of stay as someone with no history, without asking for imaging, treat that as a warning sign. Our list of BBL clinic red flags covers others.

Timing: how long after injections should you wait?

There's no single rule; it depends on the substance, how much was used, whether you've had any reaction and what your surgeon's imaging shows. With dissolvable or biostimulator fillers, surgeons may want product to settle or be dissolved before they assess your baseline. With permanent substances, the question is less about waiting and more about whether the material can be safely managed at all.

If you're considering injections now instead of a BBL

Some people read this because they're weighing a cheaper or faster option. In Colombia, injecting non-approved modeling substances is illegal, and the people who offer them outside clinics are not regulated. If you want non-surgical options, discuss approved products with a licensed physician and read our overview of non-surgical butt enhancement so you understand what each can and can't do. If you're unsure where your history leaves you, you can tell us what you've had and we'll help you figure out what to ask a surgeon.

Frequently asked questions

Can I get a BBL if I had hyaluronic acid filler in my buttocks?

Often yes, but your surgeon will want to know when, how much and where it was injected. They may want residual product to settle or be dissolved before planning fat transfer. Bring any records you have.

What are biopolymers?

In Colombia the term is used broadly for non-approved permanent substances injected for body shaping, such as industrial silicone or oils. They can cause chronic inflammation, hardening and pain years later, and injecting them is a crime under Ley 2316 of 2023.

Can biopolymers be removed during a BBL?

It depends on the amount, location and how the tissue has reacted. Removal is often a separate, specialized operation, and some surgeons won't place fat in the same area afterward. Get a plan based on imaging from a surgeon experienced in this work.

Do I need an MRI before a BBL if I had injections?

Your surgeon decides. Ultrasound is commonly used for the buttock's soft tissue, and MRI may be requested when a permanent substance is suspected. Ask what they want and whether a scan from home is acceptable.

Should I tell my surgeon about a butt shot I got years ago?

Yes. Permanent substances don't disappear over time, and your surgeon needs to know what's in the area before placing cannulas or fat. Leaving it out is a safety risk, not just a cosmetic one.