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