| A | B |
|---|
| Beau's Lines | Visible depressions running across the width of the natural nail plate, usually a result of major illness or injury that has traumatized the body. |
| Blue Fingernails | Blue or purple nail bed, usually from poor circulation. |
| Bruised Nail Beds | Dark purple spots, usually due to physical injury. |
| Discolored Nails | Nails turn a variety of colors, may indicate surface staining, a systemic disorder. |
| Eggshell Nails | Noticeably thin, white nail plates that are more flexible than normal and can curve over the free edge, usually caused by improper diet, hereditary factors, internal disease, or medication. |
| Hang Nail | Living skin around the nail plate. |
| Koilonychia | Also known as spoon nails; inverted or concave nails. |
| Pyogenic Granuloma | Rapidly growing and contagious bacteria tht can cause infection. Yellow and green in early stages. |
| Melanonychia | Darkening of the fingernails or toenails; may be a black band within the nail plate extending from the base to the free edge. |
| Nail Pterygium | Abnormal stretching of skin around the nail plate; usually caused by serious injury such as burns. |
| Onychauxis | Thickening of the fingernails or toenails. |
| Onychogryposis | Ram's Horn or claw nails; an enlargement of the fingernails or toenails accompanied by increased thickening and curvature. |
| Onychophagy | Bitten nails; chewed nails or chewed hardened skin surrounding the nail plate. |
| Onychorrhexis | Split or brittle nails that have a series of lengthwise ridges giving a rough appearance to the surface of the nail plate. |
| Pincer Nail | Trumpet nail; increased crosswise curvature throughout the nail plate caused by an increased crosswise curvature throughout the nail plate caused by an increased curvature of the matrix. |
| Plicatured nail | Folded nail; a type of highly curved nail plate, usually caused by injury to the matrix, but may be inherited. |
| Ridges | Vertical lines running the length of the natural nail plate that are caused by uneven growth of the nails, usually the result of normal aging. |
| Splinter Hemorrhage | Physical trauma or injury to the nai bed that damages the capillaries and allows a small amount of blood flow. |
| Onychosis | Any natural nail deformity or disease. |
| Nail Psoriasis | Nail surface pitting, roughness, onycholysis, and bed discolorations. |
