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