I heard some stomach bypass techniques used to reduce weight. Is it helpful?

It can be helpful, but it's also risky. Surgery is always a risk, and any surgery that involves your stomach is especially risky. There are also a lot of potential side effects from stomach bypass surgery, including problems with eating and absorption of food, malnutrition, and even death.

That said, if you're obese and have tried everything else to lose weight with no success, then surgery may be the best option for you. The key is to weigh the risks and benefits carefully before making a decision. Talk to your doctor about your options and see what she thinks is the best course of action for you.