Matching Pairs Nail Disorders & DiseasesOnline version Match the nail disorder with its' cause. by Rosalind Carter 1 Eggshell nails 2 Melanonychia 3 Discolored nails 4 Plicatured nail 5 Splinter hemorrhage 6 Blue fingernails 7 Bruised nail beds 8 Koilonychia 9 Hangnails 10 Onychophagy 11 Onychorrhexis 12 Leukonychia spots 13 Beau’s lines 14 Ridges May be just surface staining, a systemic disorder or poor blood circulation. Minor injury to the nail matrix. Improper diet, hereditary factors, internal disease, or medication. Small injury to the nail bed. Results of a habit of chewing nail or the hardened, damaged skin surrounding the nail. A lack of circulating oxygen in the red blood cells. Increased pigment cells usually within the matrix. Uneven growth of the nails, normal aging. Major injury or illness that has traumatized the body, such as pneumonia, adverse drug reaction, surgery, heart failure, massive injury, or long lasting high fever. Physical trauma or injury to the nail bed. Dry skin and small cuts. Injury to the matrix, excessive use of cuticle removers, harsh chemicals, aggressive filing or heredity. Injury to the matrix, but it may be inherited. Iron deficiency, anemia, or liver condition.