If the motion of the ship, the vibration of the aircraft, or the drone of your car’s engine causes this problem, try to fix your attention on something stable, perhaps the horizon or the road ahead.
बहुत ज़्यादा जी मिचलाए तो एण्टीहिस्टामाइन दवाएँ लेने से कुछ आराम मिल सकता है ।