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