Whats the reason when someone feels like some one is using needles on one's body?

Poss. nerve pinching: Often when a nerve is bumped or pressure is put on it, there will be tingling, numbness, or a pins and needles sensation in the area that the nerve supports.

Depeneds: It can represent many things - generally over-sensitivity or hypersensitivity means that your nerves are excessively sensitive to stimuli like touch. One thing that can cause that is the coming of zoster or shingles.