Your Toenails Know More Than You Do: The Hidden Health Clues Below the Surface

Persistent yellow or brown discoloration in the toenails is a strong indicator of a fungal infection, but it can also be linked to other health issues. In rare cases, chronic lung disease, lymphedema, or rheumatoid arthritis may present with what is known as "yellow nail syndrome." Smokers and those with certain vitamin deficiencies may also notice a yellowing tint.