Fat Dissolving Injections Side Effects & Safety Tips

Written by an Expert Aesthetic Content Writer Lisa.
Reviewed by Expert Medical Director Dr. Raj Thethi
Published on: March 4, 2025
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Fat Dissolving Injections Side Effects & Safety Tips

Fat-burning injections are a popular treatment for eliminating stubborn fat pockets around the stomach or under the chin. The injections break down fat cells, which the body gradually removes naturally. 

Though highly effective, considering the side effects of fat-dissolving injections before the treatment is essential.
If you’re considering these injections to rid yourself of fat pockets, continue reading this blog to learn about potential risks and how to avoid them. 

Side Effects of Fat Dissolving Injections

As with every cosmetic procedure, fat-melting injections carry side effects. Some are self-limiting, while others demand medical attention. Below are some of the temporary side effects you could experience after undergoing treatment:

  • Swelling and Redness

The syringe pierces the skin, so the area may swell and become red after the injection. This is temporary and happens because your body is also attempting to flush out the fat. The swelling will last for a few days and then gradually decrease on its own.

  • Bruising and Tenderness

Small bruises may appear on the skin since the injections are given with a needle. You may also feel some tenderness in the injected area. These will fade away within a week or two.

  • Pain or Discomfort

Some people feel mild pain or discomfort in the area of the injection. This is usually temporary and can be managed with painkillers if needed.

  • Numbness or Lumps

Sometimes, the skin around the treated area will be numb temporarily. Hard bumps may also occur as the body breaks down the fat. These bumps usually soften and disappear over time.

  • Itching or Heat Sensation

You may notice itching or a warm sensation on the treated skin. This is caused by the chemical reaction happening underneath—your body is breaking down and removing the fat. It should clear up after a few days.

Does fat dissolving injection work? This guide will help you navigate if it’s the right option for you. 

Longterm Side Effects of Fat Burning Injections

Most side effects of fat-dissolving injections disappear within days. However, some may have lasting effects. These are rare, but you should be aware of them.

  • Changes in Skin Texture

In rare cases, the skin treated with the fat-dissolving injection may become slightly looser or look different. This happens because fat has been removed from under the skin, leaving it saggy.

  • Nerve Damage

While rare, nerve damage may also occur when the injection is not done properly. This would result in muscle weakness around the injected area or longer-lasting numbness.

  • Scarring 

When improperly injected, it could lead to small sores or ulcers on the skin. These could result in scarring. Choosing a skilled doctor may reduce such risks.

Avoiding Fat Dissolving Injections Side Effects

While some side effects cannot be avoided, there are ways to reduce the risk and make your treatment safe.

  • Choose a Qualified Doctor

Always see a trained and qualified doctor or nurse for fat-dissolving injections. A professional knows how to inject correctly to avoid any problems.

  • Have a Consultation Before Treatment

Consult with your physician before having the treatment. They will take your medical history, understand your goals, determine your suitability for injections, and explain the risks. This consultation will help you to make an informed decision.

  • Stick to Aftercare

Your doctor will give you instructions to take care after the injections—to help with healing and getting optimal results. You should follow their instructions. 

The aftercare may involve:

  1. Not touching or massaging the treated area.
  2. Drinking lots of water to aid your body in flushing out the fat.
  3. Not smoking and not drinking alcohol, which slow down healing.
  4. Not doing heavy exercise for a few days.
  • Watch your Symptoms

Take note of your body’s reaction after the injection. Redness, bruising, and mild swelling are to be anticipated, but if you experience pain, unusual swellings, or signs of infection (such as fever or pus), contact your doctor immediately.

When to Talk to Your Doctor

While most of the side effects of fat dissolving injections are mild, some symptoms may require immediate medical attention. Talk to your doctor if you experience:

  • Severe swelling or pain that doesn’t improve. 
  • Signs of infection (fever, pus, or extreme redness)
  • Unusual lumps or hardness that doesn’t go away
  • Difficulty moving the area that was treated. 
  • Allergic reactions (difficulty breathing or rash)

Concluding the Side Effects of Fat Burning Injections

Fat dissolving injections Leeds are an option to melt resistant fat without surgery, but they have side effects. Most side effects are minor and temporary, but there are a few long-term risks. Choosing a skilled practitioner and following aftercare can reduce risks and improve results. If you are considering this treatment, make sure to discuss all possible side effects with your doctor before the procedure.

Stay informed & bid farewell to the fat pockets!

FAQs

1. What to avoid after fat dissolving injections?

Avoid intense workouts, drinking alcohol, hot showers or saunas after getting fat dissolving injections.  

2. Who is not suitable for fat burner injections?

The following individuals may not be good candidates for fat-dissolving injections.  Those who have:

  • Larger fat pockets. 
  • Skin sagging. 
  • Active infections, bleeding or autoimmune disorders, 
  • Pregnancy or nursing moms.
  • No commitments to sticking to the aftercare.

3. Do you get saggy skin after fat melting injections?

No, this is not very common after fat-dissolving injections. However, skin may get saggy after weight-loss injections. 

4. Are fat dissolving injections safe?

Fat-dissolving injections are safe when they are FDA-approved and given by an expert doctor.

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About the Author

Dr. Raj Thethi

Yorkshire Skin Centre in Leeds is a CQC-registered medical clinic. It is led by Dr Raj Thethi who completed his core surgical training in hospitals around West Yorkshire before branching into aesthetics. Dr Raj Thethi is a Northern Territory Regional Expert for an international dermal filler company called Teoxane. He also sits on their National UK Faculty.

View all posts by Dr. Raj Thethi

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