Yellow thumbnails often signal common issues like nail polish staining, smoking, or fungal infections, but can also point to underlying health problems such as thyroid issues, diabetes, psoriasis, lung diseases (like Yellow Nail Syndrome), liver conditions, or rheumatoid arthritis, requiring a doctor to diagnose the cause and recommend treatment, notes Sinclair Dermatology. Verywell Health +2
Nail fungus (onychomycosis) develops when fungi invade one (or more) of your nails. These fungi eat keratin, a protein found in nails, skin, and hair. Nail fungus usually makes the top part of your nail turn yellow first. But as the infection gets worse, your entire nail can change color and become thick and cracked.
Yellow nails could point to many conditions, such as a fungal infection or psoriasis. But if you have yellow nails along with respiratory symptoms, your healthcare provider might need to rule out yellow nail syndrome.
Or it could be a biotin deficiency, meaning a lack of good gut flora (bacteria). If you have a history of taking antibiotics or of digestive issues you may be deficient in biotin. Fungus on your nail, indicated by a yellowish discoloration, is also an indication of low biotin because of an imbalance in your gut.
Yellow nails can have many causes. It may be a sign of a fungal infection, which also can lead to thickening and crumbling. Yellow nails also can be a symptom of more serious health problems, including thyroid conditions, liver disease, congestive heart failure, lung disease, diabetes and rheumatoid arthritis.
Yellow nail syndrome (YNS) is a rare disorder characterized by slow-growing, yellow, thickened nails, lymphedema, and respiratory tract involvement. Pulmonary symptoms, such as pleural effusions or bronchiectasis, often accompany the nail abnormalities, while lymphedema may involve the extremities.
Symptoms of acute liver failure may include:
Treatment. There is no treatment because the staining will grow out as the nails grow with time. To speed up the process, give your nails a break from use of polish, avoid acetone nail polish removers and soak your nails in diluted vinegar (1 part vinegar, 4 parts water) to help reduce the yellowing.
Dehydration. If you're not getting enough water, your body will start to dehydrate. This can cause the nails to become dry and brittle, leading to yellow discolouration. Make sure you're drinking plenty of water every day to stay hydrated.
Nail changes in vitamin B12 deficiency present as hyperpigmentation of nails like bluish discoloration of nails, blue-black pigmentation with dark longitudinal streaks, and longitudinal and reticulate darkened streaks. The nail pigmentation associated with B12 deficiency is more frequent in patients with dark skin.
The toenails can turn a yellow color for a number of different reasons when it is related to diabetes. Typically, a diabetic's toenails might turn yellow due to the breakdown of sugar. Alternatively, toenails that have a yellow tint could be caused by a toenail infection.
DIY: How to get rid of yellow nails at home
If you suddenly have yellow hands, chances are it has been caused by one of these two conditions: jaundice, which can be dangerous, or carotenemia, which usually isn't.
Liver failure nails often appear as Terry's Nails, characterized by an opaque white or "ground glass" look across most of the nail, with only a thin, brownish or pinkish band at the very tip and the half-moon (lunula) often disappearing, though other changes like ridges or yellowness (jaundice) can also occur, indicating systemic issues.
Diabetic nails may look thickened, yellowish, brittle, or have an unusual shape. This is often due to reduced blood flow to the extremities and nerve damage, also known as peripheral neuropathy, which affects the feet.
People with kidney disease may notice that their nails are yellow or discolored. If the kidneys are not functioning properly, they can't effectively filter out waste products, including nitrogen waste, which can lead to changes in the color and texture of the nails, making them appear pale or yellowish.
To use baking soda and hydrogen peroxide to return your nails to a healthy color, you must first create a mixture of 1 part hydrogen peroxide and 3 parts baking soda. Then, using a cotton swab, apply the mixture to the nails and let sit for 3-5 minutes.
Fungal and bacterial infections are common culprits. These infections can occur when you expose your nails to moist and warm environments, like when you're doing the dishes or taking a long bath. Thyroid diseases, diabetes, and liver diseases can also cause your nails to turn yellow.
Four stages of liver failure define the progression of the disease: Stage 1: Inflammation. Patients may not have any symptoms at this stage, but some people may have tenderness on the right side of their abdomen. Elevated liver enzymes can be a sign of liver inflammation.
If there are symptoms of liver disease, they may include: Yellowing of the skin and the whites of the eyes, called jaundice. Yellowing of the skin might be harder to see on Black or brown skin. Belly pain and swelling.
The fastest way to repair your liver involves immediate lifestyle changes: stop alcohol/smoking, adopt a healthy diet (whole foods, less sugar/fat/processed items), manage weight/exercise, and avoid liver-harming medications, all while consulting a doctor for personalized guidance, as severe damage needs medical intervention for reversal.
Yellow nails are often caused by staining from smoking or frequent use of nail polish. However, they can also be a sign of a health condition, including nail infections, thyroid disorders, psoriasis, diabetes, or rheumatoid arthritis.
A yellow tinge or color in your nails may not always be a problem. It might just be a stain from something outside your body, such as tobacco. However, it could signify a disease or another disorder in the nail. Sometimes, yellow nails are a sign of a systemic medical condition.
During an attack of Raynaud's, affected areas of the skin usually first turn pale. Next, they often change color and feel cold and numb. When the skin warms and blood flow improves, the affected areas may change color again, throb, tingle or swell. Raynaud's most commonly affects fingers and toes.