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.
If the dark skin is persistent you can speak to your doctor. Dark spots on the skin are typically caused by hyperpigmentation, or the skin in that area forming excess melanin. This typically occurs when the skin in that area has been damaged.