Yellow toenails can be caused by a variety of factors, including aging, nail polish, fungal infections, and underlying medical conditions. Here are some details on the causes and treatments of yellow toenails:

Causes:

• Aging: As people grow older, the color, thickness, and shape of their nails tend to change, and they may develop a more yellow color.
• Nail polish: Repeated use of nail polish can cause yellowing of the nails.
• Fungal infections: A fungal infection called onychomycosis is a common cause of yellow toenails. The infection can lead the nail to turn yellow, have yellow spots, white patches, or even turn black.
• Underlying medical conditions: Yellow toenails can develop in some people as a symptom of an underlying medical condition, such as psoriasis, tuberculosis, thyroid conditions, diabetes, sinusitis, or jaundice.

Treatments:

• Home remedies: Practicing good foot hygiene, such as keeping your feet clean and dry, can help prevent fungal infections that cause yellow toenails. Home remedies such as tea tree oil, vinegar, and baking soda may also help treat yellow toenails caused by fungal infections.
• Prescription medications: Oral prescriptions such as terbinafine (Lamisil) or itraconazole (Sporanox) can be effective in treating fungal infections that cause yellow toenails.
• Medical treatment: If yellow toenails persist despite home remedies or prescription medications, it is important to see a doctor. They can diagnose the underlying cause of the yellow toenails and prescribe appropriate treatment.

It is important to note that yellow toenails can sometimes be a sign of a more serious underlying condition, so it is always best to consult a doctor if you are concerned about the color or appearance of your toenails.