14. Black Spots and Stripes
Image source: theworld-aroundus.com
Dark spots or lines often indicate some sort of medical condition, and since they typically don’t hurt, most people ignore them. However, it could mean that your body is producing an excess amount of melanin. It can also indicate a fungal infection underneath the nail. Therefore, it’s best to consult with your doctor if you see these spots as it could mean that you have psoriasis or even melanoma, which is a type of aggressive skin cancer.
