<P> It is harmless and most commonly caused by minor injuries, such as nail biting, that occur while the nail is growing . Leukonychia occurs most commonly in healthy individuals, unrelated to any known nutritional or physiological deficiency . When caused by injury the marks will disappear as the nail grows outwards, however a dietary deficiency will cause recurrent leukonychia . </P> <P> Other possible reasons for this problem with nail colour can be linked to: </P> <Ul> <Li> Arsenic poisoning </Li> <Li> Lead poisoning </Li> <Li> Pneumonia </Li> <Li> Heart disease </Li> <Li> Renal failure </Li> <Li> Ill health </Li> <Li> Hypoalbuminemia </Li> <Li> Vitamin deficiency </Li> <Li> Ulcerative colitis </Li> <Li> Hepatic cirrhosis </Li> <Li> Psychogenic stresses </Li> <Li> Onychophagia </Li> <Li> Occupational trauma </Li> <Li> Zinc deficiency </Li> <Li> Protein deficiency </Li> <Li> Psoriasis as well as eczema </Li> <Li> Iron deficiency </Li> </Ul> <Li> Psoriasis as well as eczema </Li>

What is the meaning of white spot in the nail