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