Dry needling is a technique that involves inserting thin needles into myofascial trigger points to deactivate them and alleviate pain, effectively treating conditions such as fibromyalgia. It differs from acupuncture by targeting specific muscle issues rather than the meridian system and is considered safer with fewer side effects. Dry needling is widely practiced and indicated for various pain-related diagnoses and is offered by specialists like Dr. Vandana at Phyworld clinics.