If you have diabetes, high blood pressure, heart disease, or a family history of kidney problems, you are at risk for kidney disease. Kidney disease is serious, but if you catch it early, you can slow it down or stop it. Ask your doctor to check your kidneys.
South Asia basically refers to India and the few countries around it. It is known as a subcontinent as it was not originally part of the landmass known as the Asian continent. This can be seen from the presence of the Himalayas.
It is a subcontinent due to a number of facts, some of which are the fact that India lies on its own tectonic plate (Europe on the other hand does not), and that the Subcontinent has many of the geographic features of a larger continent, contained independently in a smaller area.