A black line on your nail (medically known as melanonychia) causes a streak of dark pigmentation that runs along the nail bed. It can be ... and eyes. Your fingernails and toenails are translucent ...

According to Dr. Shokeen, the condition can impact as little as one nail on one finger, and as much as multiple nails on the hands or feet. “In severe cases, nail psoriasis can cause significant ...

The distal free edge of the nail demonstrates hyperkeratosis while eczema of the nail bed causes onychomadesis (see Figure 5). PP is diagnosed clinically, and most often affects girls under 5 ...