Fat dissolving injections have become increasingly popular as a non-surgical solution for addressing stubborn pockets of fat that resist diet and exercise. These injectable treatments, primarily using deoxycholic acid, offer patients the opportunity to reduce localized fat without invasive procedures. While many individuals achieve their desired sculpted appearance through this cosmetic procedure, it’s crucial to understand that, like any medical treatment, fat dissolving injections come with potential risks and complications. This comprehensive guide explores what can go wrong during and after fat dissolving treatments, helping you develop realistic expectations before your appointment. At Beauty Aesthetics, Toronto, we believe in transparent communication about both the benefits and risks of all cosmetic treatments we offer, ensuring our clients can make informed decisions about their body contouring journey.
Understanding Fat Dissolving Injections
What Are Fat Dissolving Injections?
Fat dissolving injections, also known as injection lipolysis, are a non-surgical fat reduction treatment that uses specialized solutions to break down fat cells. The active ingredient in most FDA-approved fat dissolving injections is deoxycholic acid, a naturally occurring bile acid in the human body that aids in fat digestion. When injected into targeted fat pockets, this acid disrupts the fat cell membrane, causing the cells to rupture and release their contents, which are then eliminated through the body’s natural processes.
How the Treatment Works
During the procedure, the healthcare provider injects small amounts of the specialized solution directly into the targeted fat layer. Once injected, the deoxycholic acid begins breaking down the fat cell membrane, initiating lipolysis – the process of fat breakdown. After the treatment, your body’s immune system naturally processes and eliminates the destroyed fat cells over time, gradually revealing a more contoured appearance in the treated area.
Common Treatment Areas
While originally approved for treating submental fullness (double chin), fat dissolving injections are now used to address various stubborn pockets of fat including:
- Double chin
- Bra bulge
- Muffin tops
- Belly fat
- Unwanted bulges around the hips
- Small pockets of fat on the arms
Potential Risks and Complications
Common Side Effects
Most patients experience mild swelling, redness, and discomfort at the injection sites. These side effects typically resolve within days after treatment and are considered normal reactions. Some patients also report:
- Bruising around injection sites
- Temporary numbness
- Hardness in the treated area
- Itching or burning sensations
Moderate Complications
Painful Knots
Some patients develop firm, sometimes painful knots in the treated areas. These nodules can persist for weeks or months after treatment. In rare cases, these knots may become infected, requiring antibiotic treatment or medical intervention.
Uneven Results
Fat dissolving injections can sometimes lead to uneven fat reduction, resulting in skin deformities or asymmetry. This is more common when treatments are performed by inexperienced providers who may not distribute injections properly across the treatment area.
Skin Laxity Issues
While the treatment effectively reduces fat, it doesn’t address loose skin. In fact, rapid fat loss without adequate skin elasticity can sometimes worsen the appearance of poor tone, particularly in older patients or those with sun-damaged skin.

Serious Complications
Nerve Injury
One of the most significant risks, particularly with double chin treatments, is injury to the marginal mandibular nerve, which can cause temporary or permanent facial muscle weakness resulting in an uneven smile or difficulty with certain facial expressions.
Tissue Necrosis
Though rare, improper injection technique can lead to tissue death in the treated area. This serious complication requires immediate medical care and may result in permanent scarring.
Allergic Reactions
Some patients may experience allergic reactions to the ingredients in the fat dissolving solution, ranging from mild skin irritations to more severe systemic reactions requiring emergency intervention.
Factors That Increase Risk of Complications
Provider Inexperience
Perhaps the most significant factor in determining risk is the experience and qualifications of your treatment provider. Treatments performed by inexperienced practitioners or at clinics without proper medical oversight significantly increase the risk of complications.
Patient Selection Issues
Not everyone is an ideal candidate for lipolysis injections. Patients with significant skin laxity, those with unrealistic expectations, or individuals with certain medical conditions may experience poor outcomes or increased complications.
Improper Technique
The actual procedure requires precise injection depth and distribution. Improper technique can lead to uneven results, increased pain, extended recovery time, or damage to surrounding tissues.
Ignoring Post-Treatment Guidelines
Patients who don’t follow post-treatment care instructions, such as avoiding strenuous exercise for the recommended period or applying cold compresses as directed, may experience increased swelling or other complications.
Minimizing Risks: What You Should Know Before Treatment
Importance of Consultation
A thorough consultation with a qualified healthcare professional is essential before undergoing fat dissolving treatments. This appointment should include a detailed discussion of your medical history, aesthetic goals, and a physical assessment to determine if you’re a suitable candidate for injection lipolysis.

Setting Realistic Expectations
Understanding what fat dissolving injections can and cannot achieve is crucial for satisfaction with your results. These treatments are designed for small, stubborn pockets of fat, not as weight loss methods or solutions for significant fat reduction.
The Role of Weight Stability
Ideal candidates maintain a stable weight through proper diet and regular exercise. Weight fluctuations after treatment can affect your results, as remaining fat cells can expand with weight gain.
Understanding Treatment Timeline
Patients should have reasonable expectations regarding the timeline for results. Most areas require 2-4 treatment sessions spaced weeks apart, with final results visible only after several months as the body completes the natural elimination process.
Post-Treatment Issues That May Arise
Extended Recovery Period
While most patients can return to normal activities within 24-48 hours after treatment, some experience prolonged swelling or discomfort that may interfere with their daily routine for a longer period.
Unsatisfactory Results
Some patients may not achieve their treatment goals, either due to insufficient fat reduction or because their expectations exceeded what the treatment could realistically deliver.
Need for Additional Treatments
The number of treatments required varies based on the amount of fat being treated and individual response to the procedure. Some patients may need additional treatment sessions beyond what was initially planned, increasing both cost and time commitment.
Long-Term Appearance Concerns
While fat dissolving injections offer long-lasting results for patients who maintain their weight, some may experience changes in skin texture or contour irregularities that become apparent months after treatment.
Comparing Risks: Fat Dissolving vs. Other Fat Reduction Methods
Versus Surgical Options
Though fat dissolving injections carry risks, they generally have fewer severe complications than invasive procedures like liposuction. However, surgical options may provide more dramatic and immediate results for larger fat deposits.
Versus Other Non-Surgical Treatments
When compared to other non-invasive treatments like radiofrequency treatments, advanced laser treatments, or cryolipolysis, fat dissolving injections tend to have a higher risk of moderate complications but may be more effective for certain localized fat pockets.

Risk-Benefit Analysis
For small, targeted areas like double chin fat, the risks of fat dissolving injections may be acceptable given the potential benefits and avoidance of surgery. For larger areas, other body contouring treatments might offer a better risk-benefit ratio.
Red Flags: When to Seek Medical Care
Signs of Infection
Increased pain, warmth, redness, or discharge at injection sites may indicate infection and requires immediate medical attention.
Persistent or Worsening Symptoms
While mild swelling is expected, symptoms that worsen rather than improve in the days after treatment could signal a complication requiring assessment.
Severe or Unexpected Reactions
Difficulty breathing, severe pain, dramatic swelling, or other unexpected reactions should prompt immediate medical care.
Why Choose Beauty Aesthetics, Toronto
Our Professional Standards
At Beauty Aesthetics, North York, we maintain the highest professional standards for all cosmetic procedures, including fat dissolving injections. Our team follows strict protocols that prioritize patient safety and optimal outcomes.
Experienced Team with Extensive Training
Our qualified healthcare professionals have completed extensive training specifically in injectable treatments and body contouring. This specialized expertise allows us to minimize risks while maximizing results for our patients.
Comprehensive Consultation Process
We believe in thorough consultations that include in-depth digital skin analysis and detailed discussions about treatment goals, potential risks, and realistic expectations. Our team takes the time to answer all your questions about fat dissolving and help you determine if you’re an ideal candidate.
Personalized Treatment Plans
We recognize that each patient’s body and aesthetic goals are unique. Our expert team creates personalized treatment plans that may include a combination of treatments for optimal results, ensuring you receive care tailored to your specific needs.
Commitment to Safety
Patient health and safety are our primary concerns. We use only Health Canada approved products and follow stringent safety protocols for all procedures. Our clinic maintains emergency protocols and all staff are trained to recognize and manage potential complications.
Exceptional Aftercare
We provide comprehensive aftercare instructions and schedule appropriate follow-up appointments to monitor your progress. Our team remains available to address any concerns that may arise during your recovery period.
Conclusion
While fat dissolving injections offer an excellent alternative to invasive procedures for addressing stubborn fat pockets, they aren’t without risks. Understanding potential complications and taking steps to minimize them is essential for a positive experience and satisfactory results. At Beauty Aesthetics, Toronto, we prioritize patient education, safety, and personalized care throughout your treatment journey. By choosing a reputable clinic with an experienced team, following proper pre and post-treatment protocols, and maintaining realistic expectations, you can significantly reduce your risk of complications. Remember that achieving your desired sculpted appearance often requires patience, as results develop gradually as your body processes the treated fat cells. With proper planning and professional guidance, fat dissolving injections can be a convenient option for achieving your body contouring goals with minimal disruption to your lifestyle.