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