9. Brown Discoloration
Image source: clinicaladvisor.com
A brown discoloration of the nail, which can look like brown spots or stripes or can cover the whole nail, is called melanonychia. Heat damage, radiation, and smoking can cause melanonychia. Fortunately, limiting your exposure to these elements can reverse and prevent it. However, fungal infections, psoriasis, thyroid issues, and cancer can also cause melanonychia, which is why it’s extremely important to talk to your primary physician if you develop this alarming symptom.
