How can I reduce thighs, I have very huge thighs becoz of this I feel uncomfortable while wear tight dresses

In general, you can't spot reduce, so in order to lose fat in one area, you have to lose all over. However, there was one study on intense spinning which found that the women who did it lost more fat from their thighs than the control group.

Most women are a bad judge of their own thighs, because they are looking down at them and see them from a bad angle. Bear in mind, women are supposed to have good sized thighs. The very skinny legs you see on models are not natural or healthy. It's unusual to have huge thighs if everything else is the right size. If you are carrying extra weight, it's much more likely to go to your belly.