How can you lose 10lbs in 10 days?

Yes. The atkins diet if done correctly may result in weight loss up to 15 pounds in the first 2 weeks. This diet is not recommended for all people, so consult your physician before starting this type of weight loss program.
Diet and exercise. First of all, i can't think of any physician who would recommend losing 10lb in 10 days. It's just not a healthy way to lose weight. Doing it could cause more harm than good. However, it can probably be done through a combination of intense fasting and burning of calories through exercise. But don't try it.