Question

If we go to the speed of light the mass goes to infinity so there is any change in the body

Answer 1

yesss there will be change in the body near to the head.

Answer 2

No,the the body will remain the same only its mass will increase.Technical definition of mass tells us that mass is the amount of matter contained in a body,but this is always not true,and in your question its definitely not. Actually mass is the amount inertia of a body which it possesses.As the body goes close to the speed of light its inertia increases.And the assumption was that mass is the amount of inertia of contained in a object.Thats why mass increases but the body remains constant.
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