
Green nails, also known as greenies or green nail syndrome, are caused by bacteria called Pseudomonas aeruginosa, which is found in fresh and salt water. It is most commonly found in places like swimming pools, hot tubs, bathtubs, and showers. The bacteria thrive in damp, moist environments with little to no air circulation, which is why it can grow under false nails. While it may be unsightly, green nail syndrome does not usually cause any serious health problems. Treatment options include filing or buffing off the green discoloration, disinfecting with rubbing alcohol or vinegar, and letting the nails heal and grow out. In some cases, it can take anywhere from 6 to 18 months for the green discoloration to completely clear, and the nails may not return to their original appearance.
| Characteristics | Values |
|---|---|
| Cause | Fungus or bacteria |
| Bacteria type | Pseudomonas aeruginosa |
| Bacteria cause | Exposure to water, manicures, heat, dermatitis, ulcerations, occlusions, excess sweating, or chemicals |
| Treatment | Soak nails in vinegar, apple cider vinegar, diluted chlorine bleach, tea tree oil, or hydrogen peroxide; use rubbing alcohol, Dr. G's Clear Nail, or an over-the-counter antifungal |
| Treatment time | 6-18 months |
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What You'll Learn

Green nails are caused by bacteria
Green nails, also known as chloronychia or green nail syndrome, are caused by bacteria called Pseudomonas aeruginosa. This type of bacteria is commonly found in fresh and salt water and thrives in damp, poorly ventilated areas. As a result, Pseudomonas aeruginosa infections are frequently associated with swimming pools, hot tubs, bathtubs, and showers. The bacteria can also accumulate under acrylic nails, leading to green discolouration.
While green nails are typically not a cause for serious health concerns, they can be unsightly and may indicate the presence of an underlying fungal or bacterial infection. In some cases, the green discolouration may be a result of fungus accumulating under the nail, creating an environment conducive to bacterial growth. Therefore, it is important to address the issue and take steps to prevent further infections.
To treat green nails caused by bacteria, it is recommended to soak the affected nails in rubbing alcohol or vinegar, which can help sanitise the nails and prevent the spread of the infection. Additionally, filing or buffing the nails can help remove the discoloured areas. However, it is important to be gentle during this process to avoid damaging the natural nail bed. Soaking the nails in warm water can also aid in draining any pus that may have built up under the skin due to the infection.
If the infection is more severe or does not respond to home remedies, it is advisable to consult a healthcare provider. They may prescribe antibiotics or other treatments, such as an oral quinolone like ciprofloxacin, especially for elderly patients. In some cases, drainage of any abscesses that have formed may be necessary.
To prevent green nails caused by bacteria, it is important to maintain good nail hygiene. This includes trimming nails regularly, avoiding biting or picking at cuticles, and refraining from soaking nails in water for prolonged periods. When engaging in activities that involve submerging your hands in water, it is recommended to wear gloves and ensure thorough drying afterward. Additionally, using products like tea tree oil can help disinfect the nails and prevent fungal growth.
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Preventing green nails
Green nail syndrome (GNS) is a common nail disorder characterised by the development of greenish discolouration on one or more fingernails. It is usually caused by the bacteria Pseudomonas aeruginosa, which is found in various environments, including water sources, humans, animals, and soil. This bacterium thrives in warm, moist environments, making nails particularly susceptible to infection in settings like swimming pools, hot tubs, bathtubs, and showers.
To prevent GNS, it is crucial to maintain good nail hygiene and implement lifestyle modifications to minimise exposure to moisture and potential sources of bacterial contamination. Here are some detailed tips to prevent green nails:
Keep Nails Clean and Dry
It is important to keep your nails and hands clean and dry to prevent the growth of fungi and bacteria. When getting your false nails done, avoid soaking them in water for too long, as this increases the chances of fungal growth. If you plan to go swimming or participate in activities where your hands will be submerged in water, wear gloves, and ensure that you thoroughly dry your hands and nails afterward.
Trim Nails Regularly
Trimming your nails regularly is essential to prevent bacteria from becoming trapped underneath. Ensure that you disinfect the filed area with an antifungal solution, such as tea tree oil, after trimming your nails.
Protect Nails from Trauma or Injury
Trauma or injury to the nails can create entry points for bacteria, increasing the risk of GNS. Avoid nail biting and activities that may cause damage to the nails. If you work with chemicals or in an environment where your hands will be wet for extended periods, wear waterproof gloves to protect your nails.
Sanitize Nails and Manicure Tools
If you get manicures, ensure that the nail salon maintains proper hygiene standards to prevent the transfer of bacteria between clients. Sanitize your nails and cuticles with rubbing alcohol or vinegar, especially after removing false nails, to prevent the spread of infection and promote nail health.
Practice Good Hand Hygiene
Wash your hands regularly and avoid touching surfaces or objects that may be contaminated. If you have cuts or broken skin around your nails, keep the area clean and apply an antiseptic ointment to prevent bacterial growth.
By following these preventative measures, you can reduce the risk of developing green nail syndrome and maintain healthy, infection-free nails.
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Treatment options for green nails
Green nail syndrome (GNS) is a nail disorder characterised by onycholysis and greenish-black discolouration of the nail bed. It is typically caused by a bacterial infection, most commonly due to Pseudomonas aeruginosa, a resilient bacterium found in various environments, including water sources, humans, animals, and soil. GNS can also be caused by fungal infections, which are often seen together with bacterial infections.
Antibiotics
Oral antibiotics, such as ciprofloxacin or levofloxacin, are sometimes prescribed to treat bacterial infections associated with GNS. However, oral antibiotics are not always necessary or recommended by all practitioners. Topical antibiotic ointments or solutions may also be applied directly to the affected nails to target bacterial growth and promote healing.
Tobramycin Eye Drops
Tobramycin eye drops have been found to be an effective and safe treatment option for GNS. The low concentration of the antibiotic agent in the eye drops can effectively suppress bacterial colonies. The patient can apply the eye drops directly to the affected area twice a day without any inconvenience or adverse effects.
Nail Debridement
In severe cases or when antibiotics are ineffective, surgical nail debridement may be necessary to remove infected nail tissue and allow for healthy nail regrowth.
Antifungal Treatments
For green nails caused by fungal infections, antifungal treatments can be used. Over-the-counter antifungal creams, such as clotrimazole, can be applied to the hands and around the nail bed to stop fungal growth and eliminate discolouration. Disinfecting the nail tools before use is important to prevent the spread of bacteria.
Home Remedies
Some home remedies for GNS include soaking the nails in diluted vinegar or a chlorine bleach solution at regular intervals. Soaking the nails in alcohol and regularly trimming them back can also help dry out the area and prevent bacterial colonisation. Keeping the nails and hands clean and dry is crucial to stop fungal growth and prevent future infections.
Lifestyle Modifications
Lifestyle modifications can be made to minimise exposure to moisture and potential sources of bacterial contamination. This includes wearing protective gloves in wet environments and avoiding prolonged exposure to water. Maintaining good nail hygiene by keeping nails clean, dry, and trimmed is also important.
It is important to seek professional help from a dermatologist or healthcare provider for a proper diagnosis and treatment plan for GNS.
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Green nails and acrylics
Green nails, also known as "greenies", are a common occurrence after getting acrylic nails removed. This happens when fungus accumulates under an acrylic nail due to trapped moisture, causing a greenish discolouration. The bacteria responsible for this, Pseudomonas aeruginosa, is commonly found in bodies of water like swimming pools, hot tubs, bathtubs, and showers.
To prevent green nails, it is recommended to avoid soaking your nails in water for extended periods and to wear gloves during activities like swimming or spa days. Trimming your nails is also essential to prevent bacteria from getting trapped. If you find yourself dealing with green nails, you can follow these steps:
- Remove any remaining acrylic nail material using nail clippers or a nail file.
- Gently buff away the green discolouration. Be careful not to scrub too hard to avoid damaging your natural nail bed.
- Disinfect your nails with rubbing alcohol, vinegar, tea tree oil, or hydrogen peroxide.
- Soak your hands in warm water for about 10 minutes, adding a few drops of tea tree oil.
In some cases, the green colour may persist even after the fungus is gone, as it may have stained the nail. It is important to be patient and allow your nails to heal and grow out completely before applying acrylics again. This process can take anywhere from 6 to 18 months, and your nails may not look the same as before the infection. Over-the-counter products are available to treat green nails, but it is crucial to follow the instructions on the label carefully.
While green nails may be unsightly, they do not typically cause any serious health problems. However, if you experience severe infections or persistent green nails, it is advisable to consult a doctor for proper treatment, such as a 1% acetic acid treatment, antibiotics, or an anti-fungal cream.
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Green nail syndrome
Individuals with compromised immune systems or underlying conditions like psoriasis, onychomycosis, or other nail problems are at a higher risk of developing GNS. Additionally, those who work with their hands regularly, such as homemakers, barbers, dishwashers, bakers, and medical personnel, are more prone to the condition. Higher risk is also associated with soccer players, military personnel, and those who wear artificial nails or tight-fitting shoes.
The treatment of GNS depends on the severity of the condition and individual needs. While oral antibiotics are rarely necessary, moderate cases of GNS may be prescribed topical antibiotics such as silver sulfadiazine, gentamicin, ciprofloxacin, bacitracin, or polymyxin B. Oral antibiotics such as ciprofloxacin or levofloxacin may be used if other therapies fail. In some cases, surgical removal of the infected nail may be required.
There are also at-home treatments for GNS, including soaking the nails in vinegar (diluted with water in a 1:1 ratio) or a chlorine bleach solution (diluted with water in a 1:4 ratio) at regular intervals. Soaking the nails in tea tree oil or hydrogen peroxide has also been recommended. Keeping the nails dry and avoiding excessive immersion in water is crucial in preventing and treating GNS. In addition, wearing waterproof gloves or rubber boots can be effective in preventing prolonged exposure to water.
The time it takes for GNS to clear varies depending on the treatment method and the severity of the condition. For example, one case study reported that after three weeks of treatment with tobramycin eye drops, the nail discoloration had almost vanished, but the onycholysis remained. In another case, eight weeks after medication, the dark green discoloration vanished, and only a small part of the onycholysis remained.
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Frequently asked questions
It can take anywhere from 6 to 18 months for green nails to clear up completely. In some cases, the nails may not return to their original appearance.
Green nails are caused by a bacterial organism called Pseudomonas aeruginosa, which thrives in damp, moist conditions with poor air circulation. It is most commonly found in water sources, including swimming pools, hot tubs, bathtubs, and showers.
To treat green nails, you can use over-the-counter products, but always follow the instructions on the label. You can also try home remedies such as disinfecting the nails with rubbing alcohol, vinegar, or tea tree oil, and soaking the nails in warm water. In severe cases, a doctor may recommend a 1% acetic acid treatment, antibiotics, or an anti-fungal cream.











































