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.
India is one example of a subcontinent because it is a part of the Asian continent. Its landmass is not connected to the Asian continent plate, thus not part of it. India is regarded as the largest nation in South Asia and also known as the South Asian subcontinent. The term is used culturally and politically.