The sensation will vary from person to person and the location of the point used. Many people have little or no sensation at all with just the awareness of the insertion of the needle. Common descriptions are of experiencing a dull ache, tingling, or slight electrical stimulation.

how deep do the needles go in?

The depth of the needle depends on a number of factors including the location of the point and the amount of tissue on the patient. Most of the points are just below the surface of the skin.