Caleb Foster
Yellow nails can be caused by a variety of factors, ranging from cosmetic to medical. In some cases, yellow nails may be a sign of an underlying health condition. While the occasional staining from nail polish or smoking is common and not harmful, persistent yellowing could indicate a fungal infection, thyroid condition, diabetes, or even something more serious like rheumatoid arthritis or yellow nail syndrome. It is important to be mindful of nail hygiene and to consult a healthcare professional if you are concerned about the colour of your nails, as it could be an indication of your overall health.
| Characteristics | Values |
|---|---|
| Cause | Dye from dark nail polish, nail fungus, yeast, bacterial or viral infections, product use, smoking, thyroid conditions, diabetes, psoriasis, rheumatoid arthritis, vitamin deficiencies, fungal nail infections, yeast, bacterial or viral infections, trauma, nutritional deficiencies, autoimmune diseases, endocrine disorders, AIDS, lymphatic diseases, cancers, chronic lung conditions, internal malignancies, lymphatic obstructions |
| Symptoms | Weakness, nail curving, nail separation from nail bed, nail ridges, slowed or stopped nail growth, breakdown of cuticles, nail thickening, onycholysis, swelling or pain around the nail, changes in finger tip shape, redness, swelling, chronic cough, swollen lower legs or ankles, fluid buildup in lung tissue, repeat sinus infections, pneumonia |
| Treatment | Soak nails in diluted vinegar, use a nail polish remover without acetone, trim nails frequently, sweep dirt from underneath nails, expose feet to fresh air, oregano oil mixed with a carrier oil, hydrogen peroxide, antifungal treatments, home remedies |
| Prevention | Avoid nail polish, especially dark shades, avoid acetone nail polish removers, keep nails clean and trim, use reputable nail salons, avoid tobacco |
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What You'll Learn
Yellow nail syndrome
The syndrome is distinguished by the presence of yellow, thickened, and curved nails, with nail growth often slowing or stopping altogether. In some cases, the nails may detach from the nail bed and fall off. YNS also presents with lymphedema, resulting in swelling in the arms and legs due to the accumulation of lymph, a protein-rich fluid. This swelling typically occurs a few months after the nail changes and can cause a feeling of heaviness or tightness in the affected areas.
Respiratory symptoms are also common in individuals with YNS. These can include a chronic cough, recurrent sinus infections (sinusitis), pneumonia, and shortness of breath. In some cases, there may be a history of respiratory problems prior to the development of nail symptoms. Additionally, YNS can lead to fluid accumulation in the membranes surrounding the lungs and the chest cavity, known as pleural effusions, which can cause chest pain and difficulty breathing.
The diagnosis of YNS requires the presence of at least two of the following: yellow nails, lymphedema, and pulmonary disease. It is often misdiagnosed as onychomycosis or other similar conditions, leading to delays in proper treatment. A thorough medical history and examination, including pulmonary, vascular, and integumentary system reviews, are crucial for accurate diagnosis. Histopathological examination of nail samples is also important to rule out other causes of yellow nails, such as fungal infections.
While there is no specific treatment for YNS, early identification of the triad of symptoms is crucial for effective management. Treatment focuses on symptom relief and addressing associated conditions, such as respiratory complications and lymphedema. Interprofessional collaboration between dermatologists, pulmonologists, and other specialists is emphasised to enhance patient outcomes and reduce the morbidity associated with the syndrome.
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Infections
Yellow nails are most commonly caused by fungal infections. When a fungus invades the nail, it can lead to thickening and a build-up of debris underneath, resulting in a yellow colour. This is known as onychomycosis, which can affect any part of the toenail and may cause discomfort when walking. Onycholysis, another term for nail lifting, can occur as a result of trauma, psoriasis, or as a side effect of certain medications. It is often seen in occupations that involve working with hands, such as butchers, food handlers, and hairdressers.
Fungal infections can be treated with oral or topical antifungal medications, although cure rates are typically between 50-60%, and recurrence is common. Treatment duration can be lengthy, and in some cases, repeated treatments may be necessary. Tea tree oil and oregano oil, mixed with a carrier oil, are also suggested as home remedies with antifungal properties. Good nail hygiene, including regular washing and drying, can help prevent fungal infections.
Yellow nail syndrome, a rare disorder, can also cause yellow nails along with respiratory symptoms, such as a chronic cough, repeat sinus infections, and fluid buildup in the lungs. It is characterised by thickened, curved, and slowed-growing nails that may separate from the nail bed. While the cause of this condition is unknown, it is often seen in people over 50. Treatment options include specialised massages to improve circulation and procedures to drain excess fluid from the lungs.
In some cases, yellow nails can indicate a more serious underlying health condition, such as diabetes, thyroid disease, or lymphatic system problems. Nail discolouration can also be caused by certain products, such as dark nail polish, which can stain the nail plate.
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Allergic reactions
Yellow nails can be caused by various factors, including fungal infections, product use, and, in rare cases, underlying health conditions such as thyroid issues, diabetes, or skin cancer. While nail discolouration itself may not always be a cause for concern, it is important to be vigilant about potential allergic reactions and other associated symptoms.
Nail cosmetics, including enamels, gel polishes, and artificial nail extensions, can cause allergic contact dermatitis, characterised by redness, swelling, itching, and blisters around the nail area. The chemical most responsible for these allergic reactions is tosylamide formaldehyde resin, found in wet and dried nail enamel. Additionally, artificial nails and gel nail extensions contain liquid methacrylate acid esters, which are strong sensitisers that can induce irritant and allergic contact dermatitis. Acrylates, used in both preformed and sculpted nails, can lead to rare but severe reactions, including paraesthesias (tingling and prickling) and nail loss.
Gel nail polishes and extensions contain reactive monomers and photoinitiators, which can cause immediate contact dermatitis or delayed hypersensitivity reactions. These ingredients belong to the chemical families of acrylates and methacrylates, which are known skin sensitisers. If absorbed into the skin, these chemicals may trigger an allergic response. Symptoms of a gel nail polish allergy can vary depending on individual sensitivity, ranging from skin reactions around the nails to nail changes, such as onycholysis (detachment of the nail from the nail bed).
To prevent allergic reactions, it is advisable to choose hypoallergenic nail products that exclude common allergens like methacrylates, formaldehyde, toluene, and dibutyl phthalate (DBP). Before using a new product, perform a patch test by applying a small amount to your skin and waiting 48 hours to check for any adverse reactions. If you experience an allergic reaction, consult a dermatologist or allergist for diagnosis and treatment. Topical corticosteroid creams or ointments can help manage symptoms like itching, redness, and swelling.
In addition to allergic contact dermatitis, nail cosmetics can also cause secondary nail infections, such as paronychia, onycholysis, onychia, and prolonged paraesthesia. It is important to be cautious when using nail enamel removers as well, as they contain strong solvents that can irritate and dry the nail plate and surrounding skin, potentially leading to nail dryness and brittleness.
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Vitamin deficiencies
Yellow nails can be caused by various factors, including fungal infections, product use, and underlying health conditions. While vitamin deficiencies can cause nail discolouration, it is important to note that yellow nails are not always indicative of a vitamin deficiency and can be caused by other factors.
Vitamin E deficiency can lead to brittle, ridged, and yellow nails. Vitamin E oil is often recommended as a treatment for yellow nails caused by nail polish remover and nail polish. It can help to reverse the damage, eliminate yellowing, and improve the overall health and appearance of the nails. Additionally, vitamin E oil has hydrating, strengthening, and protective properties, making it beneficial for nail health.
Zinc, calcium, and B-complex vitamin deficiencies have also been linked to nail discolouration. White lines or ridges on the nails may indicate a lack of these specific vitamins and minerals. Heart and lung conditions, digestive issues, and certain cancers can also cause nail discolouration and should not be overlooked.
It is important to consult a healthcare professional if you suspect a vitamin deficiency or if your nail discolouration persists or is accompanied by other symptoms. A doctor can help determine the underlying cause and recommend appropriate treatment or dietary changes.
Additionally, maintaining proper nail hygiene, avoiding harsh chemicals, and limiting the use of nail polish and acetone-based removers can help prevent nail discolouration and improve nail health.
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Poor nail hygiene
Yellow nails can be unsightly and are often a sign of poor nail hygiene. While not all nail discolouration is due to underlying health issues, it is important to be aware of the potential causes and how to treat them.
In addition to fungal infections, poor nail hygiene can also lead to bacterial or yeast infections, which can cause yellowing. Maintaining proper nail hygiene is crucial to preventing and treating these types of infections. This includes keeping your nails dry and clean, avoiding wet or moist environments that can promote bacterial growth, and wearing protective gloves when handling chemicals or working with your hands.
Yellow nails can also be a result of staining from nail polish, especially darker shades. To prevent this, opt for lighter nail polish colours and always use a protective base coat. Additionally, be mindful of the products you use, as acetone-based nail polish removers can contribute to staining. Give your nails a break from polish and soak them in diluted vinegar (one part vinegar to four parts water) to help reduce yellowing.
While less common, vitamin or mineral deficiencies can also lead to yellow nails. Introducing a multivitamin supplement or increasing your consumption of foods rich in zinc and biotin can help address this issue.
If you notice that your nails remain yellow despite following these hygiene and care tips, it is important to consult a healthcare professional. Persistent yellow nails can be a sign of more serious underlying health issues, including thyroid conditions, psoriasis, diabetes, or even skin cancer. A dermatologist or healthcare provider can examine your nails, take a detailed medical history, and determine the appropriate next steps.
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Frequently asked questions
It could be a sign of onycholysis, which occurs when the tip of the nail plate begins to lift off the nail bed and looks white or yellow. It is commonly seen in certain occupations where people work with their hands, such as butchers, food handlers and hairdressers.
Yellow nails can be caused by staining from dark nail polish, smoking, or dyes. They can also be caused by fungal infections, thyroid conditions, diabetes, psoriasis, vitamin deficiencies, or more serious conditions such as yellow nail syndrome or chronic lung conditions.
If your nails remain yellow after new nail growth, it may be a sign of something more serious. It is recommended to see a doctor or dermatologist if your nails do not improve over 10 days to two weeks, or if you notice any other concerning symptoms such as swelling, pain, or changes in finger tip shape.
