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.
Southern Asia refers to a very large land region, some of which is considered Middle East, but the region extends east through India. There are many types of Asians that live in Southern Asia. The group that represents most of the population is Indians, who themselves are a very diverse demographic.