3.2 RESEARCH DESIGN Burns and Grove (2003:195) define a research design as âa blueprint for conducting a study with maximum control over factors that may interfere with the validity of the findingsâ.
MotherNature.com states that weak nails can mean there are problems elsewhere in the body. Psoriasis, a condition of the skin that can lead to itching, can cause weak nails. Hyperthyrodism, which is an overactive thyroid gland, can also cause weakness. Anemia may also contribute to weak nails. In addition, it can signal a calcium deficiency.
As the white spots grow bigger the toenail can become either thinner or thicker and may change in color. The nail also becomes weaker and may tend to split or flake. Nutritional factors such as vitamin or mineral deficiencies can cause white spots to appear on the fingernails and toenails.