Nail Polish: Frequent use of nail polish, especially darker colors, can stain nails over time. When nail polish is left on the nails for too long without a break, it can lead to yellowing.
Fungal Infections: One of the most common causes of yellow nails is a fungal infection of the nail, known medically as onychomycosis. As the infection worsens, the nail may thicken, become brittle, and turn yellowish.
Smoking: Nicotine from smoking cigarettes is a major culprit in staining nails yellow. The tar and nicotine in tobacco smoke can settle into the skin and nails, leading to discoloration.
Poor Diet: Lack of certain nutrients can affect the health of your nails. For example, deficiencies in vitamins like vitamin E and zinc can lead to yellowing nails.
Health Conditions: Certain conditions like psoriasis, thyroid diseases, and diabetes can lead to nail discoloration, including yellowing. Chronic liver disease and lymphatic issues (like lymphedema) can also cause nails to turn yellow.
Aging: As you age, changes in the growth and health of your nails can cause them to become thicker and more prone to discoloration, including yellowing.
Chemical Exposure: Regular exposure to harsh chemicals, such as those found in cleaning products, can stain or damage your nails, leading to a yellowish hue.
If your yellow nails are accompanied by other symptoms like thickening, crumbling, or changes in shape, it might be a good idea to consult a healthcare provider to rule out infections or underlying health issues. Maintaining good nail hygiene and giving nails a break from polish can help prevent and address yellowing.