Infiltration of nails is a bacterial infection that develops between your natural nail and a fake nail, often creating a characteristic green spot. We regularly see women concerned about this phenomenon in our practice of sports coaches. Here is what you need to know:
- Infiltration is not a fungus or fungus
- It appears mainly under the false nails (gel, capsule, resin)
- The green color comes from a specific bacteria
- Rapid treatment avoids complications
Rest assured: with the right gestures and an appropriate response, you can effectively address this problem. Let's find out together how to identify, treat and prevent nail infiltration.
What is a nail infiltration?
Ungeal infiltration refers to bacterial contamination between your natural nail and an artificial extension. In concrete terms, water or moisture remains trapped under the false nail, creating an environment conducive to the proliferation of microorganisms.
The responsible bacteria are called Pseudomonas aeruginosa. It produces a blue-green pigment that colores nail, hence the appearance of this famous green spot under the surface. This coloration can sometimes pull towards yellow, brown or even black depending on the stage of infection.
Infiltration can affect a single nail or extend to several fingers if you do not react quickly. We insist on this: it is not a fatality, but a reaction of your body to a damp and closed environment.
What are the main causes of infiltration?
Several factors favour the appearance of infiltration. We regularly observe them at our sports clients who ask for their hands:
The detachment of the false nail represents cause number one. A shock, a sudden movement during your sports session, or simply a neglected interview create a space where water infiltrates. We also recommend that our athletes check their nails after each intensive training.
A miscarried pose is the second major factor. An ongular prosthetist who does not comply with hygiene protocols or uses poor quality products exposes his clients to this risk.
Excessive humidity plays a decisive role. If you do the cleaning without gloves, if you work in a wet environment, or if you regularly practice swimming with fake nails, you multiply the risks by three according to some professional studies.
People with diabetes or immunocompromised disease also have increased vulnerability to bacterial infections, including infiltration.
How to recognize infiltration on nails?
Identifying infiltration quickly makes it possible to act before the situation worsens. Here are the signs that must alert you:
The Colorful Spot remains the most visible symptom. It usually starts small, often green, and gradually expands if you do not intervene. We have seen cases where the spot occupied less than 2 mm at the beginning, then colonized half of the nail in a few days.
The texture of the nail changes. You notice that it becomes softer, friable, sometimes abnormally thick. By passing your finger on, you can feel a difference in consistency with your other nails.
A feeling of persistent humidity appears under the false nail. Some women describe an impression of "wet lift" even hours after washing their hands.
In the advanced stages, pain, itching or an unpleasant smell may occur. If you are there, consult a healthcare professional quickly.
What is the difference between infiltration, fungus and fungus?
This confusion constantly comes back in your questions, and we understand why: the symptoms are similar. However, differences are important in choosing the right treatment.
Infiltration comes from a bacterium (Pseudomonas aeruginosa). It appears quickly, often in a few days, and is characterized by this famous green color. Longe usually does not thicken excessively at first. You do not smell strong in the early stages, and the pain is initially rare.
MycosisIt is the result of a fungus. Its development is slower, spreading over several weeks or months. Longe gradually thickens, becomes yellowish or whitish, deforms and often produces a characteristic smell. Mycosis attacks the very structure of the deep nail.
Treatment differs radically: infiltration responds to antibacterial solutions, while mycosis requires antifungals. This is why accurate diagnosis is essential before any action.
Is it dangerous for health?
Let's be clear: Quickly treated infiltration poses little risk. Neglected, it can cause serious complications.
Immediate risks include the extension of infection to surrounding tissues (perionyxis), causing redness, swelling and pain around the nail. We accompanied athletes who could no longer hold their weights or snowshoes because of this inflammation.
Serious complications remain rare but exist. In extreme cases, infection can lead to permanent loss of nail. Immunocompromised people or people with diabetes are at risk of spreading infection in the blood (septicaemia), a situation that requires hospitalization.
Propagation to other nails is a real risk if you continue to wear contaminated fake nails or if you do not properly disinfect your hands.
We estimate that about 85% of the infiltration treated within 48 hours heals without sequelae. This number drops to 40% after a week without treatment.
What to do in case of infiltration?
Your reaction in the early hours determines the evolution of the situation. Here's our emergency protocol:
First step: remove the wrong nail immediately. Don't wait for your next date with the prosthetist. If you cannot do it yourself without damaging natural nails, consult urgently.
Step two: clean and disinfect. Wash your hands thoroughly with warm water and mild soap. Dry perfectly, without rubbing abruptly.
Step three: let the nail breathe. No varnish, no new installation, no cosmetic products for a minimum of 15 days. Your nail needs air to remove residual moisture.
Step four: monitor evolution. Photograph the nail to compare its appearance day after day. If the stain extends after 48 hours of home care, consult a doctor.
We also recommend that you gently cut nails to remove damaged parts by disinfecting your instruments before and after use.
Home treatments for infiltration
Several natural solutions have proven their effectiveness for mild to moderate infiltrations:
The Dakin remains our first choice. This antiseptic disinfectant is used in a 15-minute bath twice a day for a week. Fill a small container, immerse the nail concerned, then dry thoroughly.
The essential oil of tea tree has recognized antibacterial properties. Apply 2 pure drops directly to the affected nail, gently massage, let in. Repeat morning and evening for at least 10 days.
Camomille baths calm and disinfect naturally. Prepare a strong infusion with 3 sachets in 500 ml boiling water, let cool to a bearable temperature, then dip your fingers 15 minutes, three times a day.
Sea salt creates an environment hostile to bacteria. Dissolve 2 tablespoons of large salt in a hot water bowl. Soak your nails morning and evening for 3 consecutive days.
Cider vinegar acidifies the environment and inhibits bacterial proliferation. Immerse a cotton, buffer nail, let the air dry. A daily application is sufficient for 7 days.
| Treatment | Frequency | Duration | Benefits |
| Dakin | 2x/day, 15 min | 7 days | Powerful, medical antiseptic |
| Tea tree oil | 2x/day | 10 days | Natural antibacterial, practical |
| Camomille | 3x/day, 15 min | 5-7 days | Soothing, anti-inflammatory |
| Sea salt | 2x/day | 3 days | Economical, disinfectant |
| Cider vinegar | 1x/day | 7 days | Easy, available everywhere |
When should you consult a professional?
Some signals require medical consultation without delay. We strongly encourage you to make an appointment if:
The spot spreads quickly Despite your home care, covering more than 50% of the nail within 3 days. This indicates an aggressive infection that requires oral antibiotic treatment.
Significant pains appear, accompanied by redness, heat or swelling around the nail. These symptoms indicate a soft tissue infection (perionyxis) that may evolve into an abscess.
Longe takes off massively from his bed, creating a visible pocket. This situation promotes the accumulation of bacteria and complicates natural healing.
You are diabetic, immunocompromised or pregnant. These conditions change your ability to fight infections. Strict medical follow-up is essential.
No improvement occurs after 5 days rigorous home treatment. You waste valuable time and risk complications.
The doctor may prescribe specific antibacterial creams, professional disinfectant solutions, or even oral treatment if the infection has spread. In severe cases, partial or complete removal of the nail may be necessary to permanently eradicate the bacteria.
How to prevent nail infiltration?
Prevention remains your best weapon. We apply these principles with our sports clients who greatly solicit their hands:
Select your institute rigorously. Verify that the prosthetist sterilizes its instruments, uses new or disinfected products for each client, and works in a clean environment. Don't hesitate to ask questions about its hygiene protocols.
Space the false nails. We recommend a minimum of 2 weeks break every 3 months to allow your natural nails to breathe and regenerate. This reduces the risk of infiltration by 60%.
Carefully dry your hands after each washing, with a strong emphasis on the contours of the nails. Use a clean towel or hand dryer, but avoid leaving your fingers moist for more than 2 minutes.
Wear gloves for all household tasks involving water: dishes, cleaning, gardening. This simple habit divides by four your risk of infiltration according to our experience.
Respect scrupulous filling appointments, usually every 3 weeks. Even minimal detachment is a gateway to moisture and bacteria.
Invest in professional quality products Rather than in low-cost kits. The difference in cost (about 30% more) is justified by better adhesion and healthier composition.
Feed your nails with dietary supplements containing biotin (2.5 mg daily), zinc (10 mg daily) and vitamin C (500 mg daily). Healthy nails are more resistant to aggression.
Should we avoid fake nails in case of infiltration?
Yes, categorically and without exception. We are formal on this point after advising dozens of women facing this problem.
No new installation shall be carried out until the infiltration has completely disappeared and the nail has not recovered a healthy appearance. This period varies between 2 and 6 weeks depending on the initial severity.
Place a fake nail on an active infiltration comes back to imprisoning bacteria under an impermeable layer. You offer them the ideal conditions to proliferate: heat, humidity, darkness. The infection will inevitably worsen, which can permanently destroy your natural nail.
Even after apparent healingWe recommend that we wait until the nail has grown sufficiently to remove any trace of the infection. Count about 1 mm of shoot per week, 6 to 8 weeks for full renewal.
Temporary alternatives If you can't do without artificial nails for an event, opt for quality nail presses, applied on a perfectly dry and healthy nail. Remove them at the end of the event.
After infiltration, some women develop increased sensitivity. We suggest that they prefer semi-permanent or classic varnishes, which allow to breathe more.
Infiltration of nails on social networks: between myth and reality
Social networks are full of advice on nail infiltration. Unfortunately, a lot of information circulating on TikTok or Instagram is inaccurate or even dangerous.
The myth of the miracle lemon : Some influencers recommend applying pure lemon juice to infected nails. If the lemon does have mild antibacterial properties, its acidity can severely irritate the peri-ungeal skin and delay healing.
The legend of the varnish for "sceller" infection We saw the idea that applying several layers of varnish would prevent infiltration from spreading. This is exactly the opposite: you create an anaerobic environment that promotes bacterial proliferation.
Online diagnostics is another danger. A photo never replaces a clinical examination. We've seen women confuse infiltration with ungeal melanoma, a much more serious pathology, simply because an Instagram comment had reassured them wrongly.
Tutorials of "Secure Place at Home" debate as well. Even with the best equipment, reproduce the hygiene conditions of a professional institute remains complex. Mistakes of laying are the first cause of infiltration.
Keep your mind critical. Favour advice from health professionals (doctors, dermatologists, podologists) and certified ungular prosthetists. Likes and views do not guarantee the reliability of information.
Errors not to be made
We regularly identify behaviours that exacerbate infiltration. Here are the pitfalls to avoid absolutely:
Drill or scratch green stain represents the most common error. You may damage natural nails, create micro-plains that promote overinfection, and spread bacteria to other fingers.
Cover the infiltration with varnish or a new false nail is a major mistake. We have already mentioned this, but this error comes back so often that it deserves to be repeated: letting the nail breathe is the golden rule.
Neglect hand hygiene during treatment cancels your efforts. Wash your hands at least 5 times a day, dry them perfectly, and avoid touching infected nails and other parts of your body.
Stop treatment too soon because the spot is brightening. Visible discolouration does not mean that all bacteria have disappeared. Continue your care for at least 7 days, even if the improvement seems complete after 3 days.
Use the same instruments (lime, nail clippings, repellents) on healthy and infected nails. You may contaminate all your fingers. Always disinfect your alcohol tools at 70° before and after each use.
Self-diagnosing and self-treating without discernment. If you have any doubts about the nature of your problem, consult. Better a "for nothing" consultation than avoidable complication.
Respond quickly and well to infiltration
Infiltration of the nail is not a fatality, but an infection that effectively treats itself with an appropriate reaction. We emphasize three fundamental principles that we share regularly with our clients:
Rapid action makes all the difference. Upon the appearance of a suspicious spot, remove the false nail and start care. Every day of delay complicates treatment and prolongs healing.
Rigor in application care protocols ensure success. Respect frequencies, durations, dosages. Treatment well followed for 7 days greatly exceeds approximate treatment for 3 weeks.
Prevention remains your best ally. By adopting good habits (hygiene, spacing, hydration, protection), you drastically reduce your risk of developing infiltration.
We accompany working women every day who want to take care of them without sacrificing their health. Nails, like the rest of the body, deserve attention and respect. A beautiful manicure should never compromise your well-being.
