The Truth About Polynucleotides Injection Side Effects Long-Term: What You Need to Know

Summary

Quick Answer: Are Polynucleotide Injections Safe Long-Term?

• The polynucleotide injection treatment is generally safe, especially when it is administered by an experienced and qualified medical practitioner.
• Although it rarely happens, long-term side effects can still occur after your treatment. It may include:
  • Persistent swelling or nodules
  • Delayed inflammatory reactions
  • Uneven skin texture
• Your risk may increase because of:
  • Poor technique
  • Over-treatment
  • Low-quality products
• Choosing an experienced practitioner and following the aftercare instructions from your doctor will help reduce your risk of complications.

 

What Are Polynucleotide Injections?

Polynucleotide injections are skin-rejuvenation treatments designed to support the natural healing and repair processes of your skin.

Polynucleotides are made from purified DNA building blocks. Some products use highly purified DNA from sources such as salmon or trout.

Unlike dermal fillers, which add volume to your skin, polynucleotides are mainly used to improve the quality of your skin. They may help support hydration, elasticity, and the production of collagen and elastin.

They are commonly used on the:

• Face
• Under-eye area
• Neck
• Décolletage
• Hands
• Parts of your body with scarring or poor skin quality

The goal is usually to make your skin look healthier, smoother, and more hydrated, rather than changing the shape of your face.

However, research into polynucleotide treatments is still developing. Although the early results are really promising, there is only a small amount of evidence available. There are only nine relevant studies that involve 219 patients based on the systematic review that has been published in 2024. With most studies that are considered low or moderate quality. This means that we still do not have enough evidence to fully understand their safety and effectiveness over many years.

 

Are Polynucleotide Injections Safe Long-Term?

So far, based on the research, there’s a reassurance on polynucleotide injections. Most reported side effects are mild and temporary, such as swelling, redness, itching, bruising, soreness, and irritation. The good thing is that there are no commonly reported serious complications available so far.

However, we cannot really say that polynucleotide injections are completely proven to be safe long-term. The treatment is still new in aesthetic medicine, and there are not enough studies that follow large numbers of patients for many years.

 

What About CE Marking in the UK?

The regulatory status can vary depending on the specific polynucleotide product being used. Some products may be regulated as medical devices and may need appropriate conformity marking, such as CE or UKCA, depending on what rules are applied.

But you need to know that a CE or UKCA mark does not mean that the treatment is completely safe.

Before the treatment, you can ask your practitioner about:

• What product will be used?
• Is it authorised for the intended use?
• What training and experience do they have?

 

Polynucleotides vs. Fillers and PRP

Polynucleotides are different from both traditional dermal fillers and platelet-rich plasma (PRP).

Dermal fillers are mainly used to add volume or shape to the area that you want to enhance, while PRP uses components that have been taken from your own blood. Polynucleotide treatments use purified-nucleotide-based material to support the quality of your skin.

Each of these treatments has its own benefits and risks. Just because the treatment says it’s natural or regenerative, it does not mean that it’s automatically safe.

 

 

Short-Term vs. Long-Term Side Effects

Common Short-Term Effects

After your treatment, you may notice some changes around the injection areas, such as:

• Mild swelling
• Redness
• Small bumps at the injection points
• Tenderness or discomfort
• Bruising
• Mild itching
• A feeling of warmth or tightness

These are just minor and temporary reactions and will usually improve as your skin heals.

 

Potential Long-Term Side Effects

It’s uncommon to have long-lasting problems from this treatment. But the researchers are still learning more about the safety of polynucleotide treatments for long-term use.

Possible concerns include:

• Swelling that does not go away: If you have an ongoing swelling, you should have it checked by your doctor.
• Persistent lumps or uneven skin: Having some small bumps can be normal at first, but if there are lumps that still remain, your doctor should assess them.
• Ongoing inflammation: If the redness, swelling, or tenderness continues, it may be a sign of a prolonged reaction.
• Fibrosis: In rare cases, if you have prolonged inflammation, it may give you firmer or altered skin texture.
• Delayed sensitivity: Sometimes, the redness, itching, or tenderness can develop later. If they persist, it should be checked by your healthcare provider.

 

What Causes Long-Term Side Effects?

Injection Technique

How and where the product is injected is important. It may give you prolonged swelling, lumps, or an uneven appearance if it’s injected too deeply, if too much product is used, or if it’s placed unevenly.

The right injection technique is very important in delicate areas such as the under-eyes.

 

Product Quality

You need also to consider the quality and suitability of the product. If you use an unverified or counterfeit product, it may increase your risk of complications.

Your practitioner will tell you what product is being used and why it is suitable for your treatment.

 

Patient Factors

Because everyone reacts differently, your practitioner may consider:

• Your previous reactions with injectables
• Allergies or sensitivities
• Existing skin problems or infections
• Medications you are taking
• Previous cosmetic treatments that you have
• Your medical conditions

If you have certain inflammatory or autoimmune conditions, you may need an individual assessment before trying the treatment.

 

Overuse and Frequency

Having more injections will not necessarily give you better results.

There is no strong evidence that the polynucleotides can build up dangerously in your skin if you have repeated treatments. However, your skin can get needle trauma and another exposure to the product with every injection you take.

There is also no single maintenance schedule that can be right for everyone. The frequency of your treatment should ideally be based on the response of your skin and the assessment of your practitioner, rather than automatically having more frequent sessions.

 

Can Polynucleotide Injections Go Wrong?

The polynucleotide injections are generally well tolerated, but they are not completely risk-free.

You may encounter some possible problems, such as:

• Persistent swelling or redness
• Bruising
• Lumps or uneven areas
• Local irritation
• Ongoing tenderness
• An unexpected inflammatory reaction

Sometimes, the problem may be tolerated to how, where, or how much product, rather than the polynucleotide itself.

The good news is that you can still manage those minor complications once you have identified the causes.

If you see or feel something unusual after your treatment, contact your practitioner. Avoid touching it repeatedly or try to retouch it by yourself.

 

How Long Do Polynucleotide Effects Last?

How long your results can last depends on:

• The product used
• The treatment area
• Your skin condition and age
• Your lifestyle
• The number of your treatment sessions
• How your body responds

The polynucleotides are not permanent implants. Their effects are made to support the natural processes of your skin, so your results may gradually change over time.

Your doctor may recommend you to get maintenance treatments every 6–12 months, but still, there’s not enough evidence that this schedule can be right for everyone.

 

Polynucleotide Injection Aftercare

Good aftercare can help your skin heal properly and reduce your irritation. But sometimes it may not prevent the possible complications.

Your practitioner may give you specific instructions on how you will take care of the treated area, based also on the products they’ve used.

For the first 24–48 hours, you should:

• Avoid strenuous exercise.
• Stay away from saunas, hot baths, and excessive heat.
• Limit direct sun exposure.
• Avoid alcohol if your practitioner recommends it.
• Do not touch, rub, or press the treated area if really not necessary.
• Avoid using strong or irritating skincare products unless your practitioner says they are safe to use.
• Keep the treated area clean and follow your doctor’s advice.

If you notice some bumps, do not massage, squeeze, or try to flatten them by yourself, unless your practitioner specifically tells you to do it.

 

How to Minimise Long-Term Risks

Choose a Qualified Practitioner

To help minimise your long-term risks, you need to choose a properly trained medical professional who has experience with injectable treatments and understands your facial anatomy.

 

Ask About the Product

Before your treatment, make sure you know:

• The product name
• The manufacturer
• What it is designed to do
• Where it will be injected
• Why it is suitable for you

You should also:

• Avoid unnecessary treatments.
• Share your medical history.
• Choose a clean clinical setting.
• Attend follow-up appointments.

These will all help make your treatment safe.

 

Who Should Avoid Polynucleotide Injections

Polynucleotide injections may not be suitable for everyone. You may need to avoid the treatment if you have:

• An active skin infection
• Significant skin irritation or inflammation
• An untreated wound in the treatment area

If you are pregnant or breastfeeding, you need to postpone getting your cosmetic polynucleotide injections because there is not enough research that it’s safe for you.

Those people who have autoimmune or inflammatory conditions may need an individual assessment before having their treatment. If you have one of these conditions, it does not mean that you can’t get the treatment. But you need to discuss it with a qualified medical professional so you would know what the risks and benefits are.

 

Polynucleotides vs. Other Skin Injectables

Treatment	Main Purpose	Common Concerns
Polynucleotides	It can improve the quality and hydration of your skin and support its repair.	You may experience some swelling, bruising, tenderness, and temporary irritation.
Hyaluronic acid fillers	It can add volume and improve the contour of your face.	Some swelling, lumps, unevenness, and rarely blood-vessel complications can occur.
PRP	Support the repair of your tissue with the use of your own blood.	You may experience swelling, discomfort, and complications related to injections.

All of these treatments can give you some potential risks. But the risks depend on the product, injection area, technique, practitioner, and your individual health.

 

When to Seek Medical Advice

Most of the mild side effects should gradually improve as your skin heals. But, you need to contact your doctor if you notice:

• Swelling that continues or gets worse
• Severe or increasing pain
• Redness or warmth that is getting worse
• Pus or other signs of infection
• A lump that does not go away or becomes more noticeable
• Ongoing unevenness
• Changes in the colour of your skin
• Any symptoms that worry you

Don’t wait for your follow-up check up; if you have severe symptoms, you should consult your doctor immediately. So they can identify and manage your complications right away.

 

FAQs

• Are polynucleotide injections safe long-term?

The treatment is generally safe, but its long-term safety is still being studied.

• What is the most common long-term side effect?

Although they are uncommon, you may experience persistent swelling or small irregularities in your skin.

• Can polynucleotide injections cause permanent damage?

It’s not commonly happening often. Serious or permanent complications are rare, especially if your treatment is done properly by experienced and qualified professionals.

• How often can you safely have polynucleotide injections?

Depending on your treatment plan and your doctor’s recommendation, you may have the treatment every 6–12 months.

• Do polynucleotides build up in the skin over time?

No. They are biodegradable and they break down naturally. But if you have too many treatments, it may give you skin irritation.

 

Final Thoughts

Polynucleotide injections are now becoming popular for people who want to improve the quality of their skin without adding the noticeable volume just like what traditional fillers can do.

So far, the research for this treatment is reassuring. Most of the reported side effects are mild and temporary, and those serious complications are very uncommon.

However, the long-term research is still limited. There are not enough large studies that follow the patients for many years or show what really happens after getting repeated treatments over a long time.

To help reduce your risks, you should choose a qualified practitioner, make sure that they are using appropriate products, and avoid getting unnecessary treatments. Also, you need to follow your personalised aftercare instructions from your doctor.