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 not a continent. However, you are closer to the truth than you might imagine. India is both name of a subcontinent (the Indian subcontinent) and a the name of a country which covers much of, but not all of this subcontinent. The Indian subcontinent lies in the south of the greater continent of Asia.