Pain in the Neck

Of the 30,000 workers he's surveyed, 75 percent suffer from some physical ailment because of their work. In the West, that number is closer to 60 percent.

"We don't have any national guidelines like they have in the U.S. or the U.K.," he said. "The companies in India are not bound by any legal reasons to have any particular workstation safety, or that all the employees get trained in the correct health and safety practices."

From Sleep Disorders to Diabetes

From Bangalore in the south to Gurgaon in the north, an army of 20- and 30-something Indians work 24 hours a day to answer the needs of American and British customers.

They often work in the middle of the night and sleep during the day, if they can. Many eat poorly, get little exercise and suffer from the sedentary lifestyle their jobs force upon them. They have sleep disorders, heart disease, diabetes and depression, just to name a few.

"The number of young people coming to us with problems is increasingly steadily," said Gupta, the senior consultant for internal medicine at New Delhi's Indraprastha Apollo Hospital. His patients from the IT sector are all in their 20s. "If they work for a year or two in the field, these problems will crop up."

Sharan describes that there are three stages of pain that his IT patients feel: symptoms that disappear after work; symptoms that disappear after a good night's sleep; and symptoms that don't go away.

It is that last group of people, experiencing stage 3 pain, that he sees most often.

"Many people have to give up working or give up using their hands. This kind of injury leads to a lot of burning, swelling and stiffness, and people find it very difficult to carry out their normal day to day tasks," he said.

Sometimes, the pain does not stop at the physical.

Karuna Baskar, a psychologist and the director of 1to1help.net, a counseling service for IT companies and employees, told ABC News that she talks to parents whose children are crying because mom is never home.

She talks to couples who both work in IT and never see each other because they have opposite shifts. She talks to 23-year-olds who live away from their parents and do nothing but work at night and fail to sleep during the day.