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