a recognition that genres are situated within discourse communities, wherein the beliefs and naming practices of members have relevance an emphasis on communicative purpose and social action an interest in generic structure (and its rationale)
Because of the potential implication of circulation disorders, darkened skin around the ankles that is not immediately explainable by simple environmental factors should be promptly called to the attention of a medical doctor for appropriate diagnosis and treatment.
Especially places where your feet may be exposed to water, such as around public pools, beach showers, gyms and amusement parks. But generally, you could get it from any where even your own home. The answer to what causes black toe nail fungus is microscopic fungi spores that thrive in damp areas. Walking barefoot greatly increases your chances of being exposed to this fungus.