Which side effects are most common after salmon DNA?
The most common are small bumps at the injection points, redness, mild swelling, tenderness to touch and, in some people, bruising. They are usually temporary and tend to fade within a few days, though this varies by person and area.
Because the product is placed into or just under the skin through many small points, bumps and dotted redness after treatment are an expected finding. Around the eyes and other thin, vascular areas, swelling and bruising can be more noticeable, and people taking blood thinners, aspirin or certain supplements may bruise more easily. These signs reflect the temporary effect of the needle and fluid on the skin rather than the product itself.
Some people notice tightness, an itchy sensation or slight firmness for a few days. Occasionally small, soft raised areas stay visible for longer. The doctor will advise how long to watch such findings; avoid rubbing or squeezing the area yourself.
Can salmon DNA be done if you have a fish allergy?
The product is fish-derived, so anyone with a fish allergy needs careful assessment before treatment. Always tell the doctor about any allergy history; the doctor decides whether treatment is appropriate.
Polynucleotide products go through a purification process, and manufacturers generally state that protein content is removed. Even so, for people with a serious fish or seafood allergy this information should not be treated as reassurance on its own. The type and severity of the allergy and your past reactions are reviewed, and treatment may be declined or another approach suggested.
Also mention any previous reaction to injectables, medicines or cosmetic ingredients. Signs of an allergic reaction include widespread redness, itching, swelling of the face or lips, difficulty breathing or dizziness. If any of these appear during or after treatment, call emergency services without delay.
Which symptoms mean you should contact the doctor?
Pain that keeps rising, fever, heat and hardness in the area, discharge, skin turning pale then dusky, or any change in vision are outside normal healing. Contact the treating doctor straight away or go to an emergency department.
Signs of infection usually show as pain that increases instead of easing in the first days, an area that becomes hot, red and hard, and fever. If the skin at an injection site turns white or dusky, or the surface breaks down, this can point to a problem with blood supply and needs urgent assessment.
Sudden blurred or double vision, severe headache or difficulty speaking after treatment around the face or eyes are rare but serious signs and need emergency care without delay. Do not try to treat symptoms at home; follow the treating doctor's instructions. Our warning signs page has more detail.
How long do bruising and swelling last after salmon DNA?
Swelling and bumps often settle in the first days, while bruising may take a week or longer in some people. The duration depends on the area, the technique, medicines and individual tendency, and cannot be stated exactly in advance.
Bruising forms more easily in vascular areas such as around the eyes, temples and forehead. Do not stop blood-thinning medicines or supplements on your own before treatment; discuss them with your doctor. If you have an important event, scheduling treatment at least a few weeks ahead leaves time for temporary signs to settle.
Habits can also affect healing: alcohol, saunas, intense exercise and sun exposure may prolong redness and swelling. Our page on what to do after salmon DNA covers care in more detail. If signs last longer than expected or keep increasing, tell your doctor.
What are the rare but serious risks, and how are they reduced?
Rare risks include infection, allergic reaction, prolonged firmness or nodules and, very rarely, a blocked blood vessel. Risk is reduced by assessing suitability at consultation, using genuine product and sterile conditions. There is no zero-risk option.
As with any injection, puncturing the skin carries an infection risk, so the skin should be cleaned, single-use sterile equipment used and the treatment area free of active infection. The authenticity and traceable packaging of the product also matter for safety, which our product authenticity page explains.
An authorised doctor who knows facial anatomy and can manage complications is among the most important safeguards. Pregnancy, breastfeeding, an active skin infection, autoimmune conditions or certain medicines may delay treatment, which is why a complete health history matters. The balance of risk and benefit is weighed together at an in-person consultation.
Frequently asked questions
When do the bumps after salmon DNA go away?
The small bumps at injection points usually settle within hours to a few days. The time varies with skin type, area and the amount of product. Avoid squeezing or rubbing them. If they last long or increase, tell the treating doctor.
Are fever or strong pain after salmon DNA normal?
Mild tenderness can be expected, but fever, increasing pain, heat and hardness are not part of normal healing. They can signal infection or another problem. Contact the treating doctor without delay and go to an emergency department if needed.
Can I have salmon DNA if I am allergic to fish?
The doctor decides this at consultation, considering the type and severity of the allergy. Because the product is fish-derived, you must disclose any fish or seafood allergy beforehand. If treatment is not appropriate, other options can be discussed.
Can salmon DNA cause lumps or firmness?
In some people, temporary soft raised areas or mild firmness can be felt where the product was placed, and they usually fade with time. A painful, red, hot or growing lump needs a doctor's review. Do not massage or squeeze it yourself.
Can salmon DNA be done during pregnancy or breastfeeding?
Aesthetic injections are generally postponed in these periods because safety data is limited. Tell your doctor in advance about pregnancy, breastfeeding or plans to conceive. The decision is made at consultation.
Sources (4)
- Int. J. Mol. Sci.: Polynucleotides in Aesthetic Medicine: A Review of Current Practices and Perceived Effectiveness (2024)
- Cureus: Polynucleotides and Polydeoxyribonucleotides for Skin Rejuvenation, Postoperative Scar Prevention, and Wound Healing: A Systematic Review of Randomized Clinical Trials (2026)
- J Cosmet Dermatol: Long-Term Safety of Intradermal Polynucleotides in the Periocular Region: A Retrospective Study (2026)
- U.S. FDA: Dermal Filler Do's and Don'ts for Wrinkles, Lips and More
This content is for general information and does not replace a personal medical assessment.