Dry Needling is an invasive procedure in which a solid filament needle is inserted into the skin and muscle directly at a myofascial trigger point. A myofascial trigger point consists of multiple contractions knots, which are related to the production and maintenance of the pain cycle.
It is not the same acupuncture, an aspect of traditional Chinese medicine, which is based on the metaphysical theory of normalizing energy flow in the body. Dry Needling is a western medical technique that is based on scientific studies and knowledge.