Dry needling is a semi-invasive technique that uses acupuncture needles to treat myofascial pain syndrome, a syndrome produced by trigger points. It is semi-invasive, since the needles penetrate the skin, pressing and contracting the trigger point to deactivate it and thus reduce the pain they produce.
Trigger points are weak areas of the muscle and very sensitive to palpation, which usually form in the muscles that maintain our posture. They originate when various sarcomeres (regions of the muscle fiber where muscle contraction occurs) become permanently contracted (due to the continuous release of a neurotransmitter called acetylcholine that prevents the fibers from relaxing), which decreases blood flow, creating taut bands. This decrease in blood flow does not allow proper nutrition or proper cleaning of waste from cells; as well as making the pain radiate and spread.
Trigger points have specific characteristics widely studied and can be of different types or be in different states, these points can appear for various reasons: a cold current that directly affects the muscle, a repetitive movement, keeping the muscle for a long time in a shortened position, a hit or even an injection.
This represents one of the most effective trigger point treatment techniques.