The most important points at a glance:
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Green nails can be caused by external or internal influences – including moisture-related changes under artificial nails.
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This guide explains what can cause the greenish discoloration and what to consider in everyday life.
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You will receive helpful tips on the care and responsible handling of affected nails.
What are green nails?
Greenish discoloration of the nails is not only visually noticeable – it can also be a cause for concern. In many cases, it is due to colonization with certain bacteria (e.g., Pseudomonas aeruginosa ), which can develop in moist conditions – for example, under gel nails or in the case of minor cuticle injuries.
Green nails are not considered a disease in the strict sense, but can be an indication of a disturbed balance in the nail environment.
Causes of green nails: What's behind it?
First of all, let's take a look at the potential causes that can lead to this noticeable nail discoloration .
The reasons why your healthy nails change can be varied and include both external and internal factors .
Here are some of the most common reasons that could play a role in the appearance of green nails :
✘ External causes:
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Contact with irritants: Frequent contact with substances such as disinfectants, nail polish remover, or dishwashing liquids can cause nail discoloration . These substances can weaken the natural barrier of the nails, making them more susceptible to infections that can cause green nails.
- Injuries: Minor injuries to the nails or cuticles can also serve as an entry point for bacteria, which can cause a green discoloration of the nails.
✘ Internal causes:
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Diseases: Certain diseases, especially those that affect the immune system, can increase the risk of nail infections, which can lead to a green discoloration of the nails.
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Nutrient deficiency : A lack of certain nutrients can impair nail health and make nails more susceptible to infections. This can also contribute to the development of green nails.
- Medication use: Taking certain medications can have side effects that may manifest as nail discoloration.

Signs, symptoms & disease progression: All information at a glance
If you notice that your nails have turned green , this could be a sign of a serious bacterial infection . The bacterium Pseudomonas aeruginosa is considered the main cause of green nails.
This bacterium is widespread in the environment and can thrive in moist conditions , such as those often found under artificial nails or in cases of neglected nail care .
Pseudomonas aeruginosa produces green pigments that cause the characteristic discoloration and can lead to further complications if not treated in time.
It is important to recognize the signs and symptoms early in order to create the best treatment plan . Here is some important information you should know:
+ Signs of green nails:
The first signs of an infection can be a change in nail color . You might notice a green spot appearing on the nail, which can spread over time. This could be an indication of a bacterial infection that needs treatment.
+ Symptoms of green nails:
Symptoms can vary, but often the nail becomes noticeably green , especially in advanced stages of infection. There may also be a change in nail texture , with the nail becoming dull and losing its shine.
+ Disease progression in green nails:
As the infection progresses, the nail may continue to change color and texture. In some cases , the nail may even begin to detach from the nail bed , a condition known as onycholysis .
It is therefore important to seek medical help early in order to avoid further health complications.
Green nails caused by gel nails & Co.
The use of gel nails and artificial fingernails can sometimes lead to green nails , a condition known as "greenies" in the nail beauty world.
This is because a moist environment can develop under artificial nails, which is an ideal breeding ground for bacteria such as Pseudomonas aeruginosa .
The pigments produced by the bacterium can then lead to a greenish discoloration of the nails. The risk of infection increases, especially if artificial nails are not applied correctly or if there are small injuries to the nail bed .
Expert tip: It is therefore important to exercise caution when using gel nails and other artificial nails and to pay close attention to hygiene in order to minimize the risk of developing "greenies".
How green nails are diagnosed
The diagnosis of green nails , especially in the case of Green Nail Syndrome, requires a careful examination by a specialist . The doctor will typically perform a clinical examination to determine the exact cause of the discoloration.
In some cases, a laboratory test may also be necessary , in which a sample of the nail is taken and examined for the presence of bacteria or fungi. Early diagnosis can help to develop the best treatment plan and avoid further complications.
Treating green nails: What really helps?
Treating green nails , especially greenies, requires a focused approach. Treatment should primarily aim to address the underlying causes of the infection .
In many cases, a topical treatment , such as applying an ointment directly to the affected nail, can be very effective . It is also important to take preventative measures to avoid reinfection.
Expert tip: Professional treatment of the Greenies can help restore the health of your nails and regain their natural beauty.
Discover our Nail Care Pen for the supportive reduction of nail discoloration!
The Nail Care Pen from Health Routine is a product for supportive cosmetic care of nail fungus and nail discoloration. It contains natural ingredients such as
- Tea tree oil
- Aloe Vera
- and vitamin E ,
which can help regulate the nail microflora and provide support in fighting fungal infections and discolored nails.
The Nail Care Pen particularly shines with its select trio of nourishing active ingredients:
➽ Lemon juice
It can improve the permeability of the nail, allowing valuable ingredients to penetrate deeper into the nail.
➽ Tea tree oil
This oil is known for its antifungal properties, which can support healthy nail growth.
➽ Vitamin E
This vitamin can promote nail growth and help regenerate damaged nail structures. The vitamin C it also contains helps balance the pH level.
The Nail Care Pen is suitable for daily nail care and can also be used to support the treatment of green nails. It is cruelty-free and 100% vegan.
The Nail Care Pen, in its practical pen form , is easy to use and can be applied to the affected nails several times a day .
Prevention and precautions: Everything you should know
Preventing green nails is crucial for maintaining the health and appearance of your nails . It's important to take preventative measures to minimize the risk of infection by the bacterium Pseudomonas aeruginosa .
Our expert tips for dealing with green nails in everyday life
Green nails can be a challenge, but with the right tips and tricks, you can keep your nails healthy and beautiful . Here are some expert tips that can be useful in your everyday life.
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Keep nails dry: Avoid prolonged contact with water and dry your hands and nails thoroughly to prevent the growth of bacteria and fungi.
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Trim your nails: Keep your nails short and clean to reduce the risk of infection and prevent bacteria from entering.
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Minimize stress on your nails: Avoid activities that could put stress on your nails and use protective gloves if necessary.
- Nail Care Pen: Use our Nail Care Pen regularly to cosmetically promote the health of your nails and reduce the risk of discoloration.
Pflegt auch kosmetisch bei Nagelpilzinfektion
Spendet Feuchtigkeit & regeneriert
Schützt & stärkt die Nägel
Conclusion
Green nails can be a worrying sign, but with proper care and attention it is possible to promote the health of your nails.
By combining preventive measures and effective treatment methods, you can confidently tackle nail changes.
With the right know-how, beautiful and well-groomed nails don't have to remain a pipe dream. Regular use of suitable care products, such as the Nail Care Pen, can play a supporting role.
Furthermore, it is advisable to always seek professional advice in case of persistent symptoms or uncertainties in order to find individually tailored solutions.
FAQ
How long does the treatment for green nails take?
Treatment for green nails can vary depending on the severity of the infection. It usually takes from several weeks to a few months to see visible improvements.
Are green nails contagious?
Green nails caused by a bacterial infection such as Pseudomonas aeruginosa can be potentially contagious if there is direct contact with the infected area.
It is therefore advisable to observe hygiene measures and avoid contact with infected nails in order to prevent transmission.
When should you see a doctor?
If you notice that the discoloration is spreading, or if you experience pain and discomfort, you should not hesitate to consult a doctor to receive appropriate treatment.
Early diagnosis and intervention can help accelerate the healing process and avoid possible complications.
How can you recognize nail fungus under gel nails?
Detecting nail fungus under gel nails can be challenging. A green discoloration under the artificial nails, often not immediately visible, can be an early sign. If you notice a green discoloration under the gel, it could indicate an infection.
Other symptoms, such as thickening or deformation of the nail, can also occur. In such cases, it is advisable to remove the gel nails immediately and seek medical advice for an accurate diagnosis and appropriate treatment.
Your medical advice
Our products are not intended to diagnose, treat, cure, or prevent any disease. The information provided in this article is for informational purposes only and is not intended to replace consultation with your doctor or other healthcare professional.
Furthermore, our products are not a substitute for medication or other treatments prescribed by your doctor or healthcare provider. Despite exercising due diligence, no liability or warranty is assumed for the
- Accuracy,
- Timeliness,
- completeness
- and availability of the information provided.
No legal claims can be made for any potential damages arising from the use of this information. Liability claims of any kind are excluded.





