The Superiority of Water-Diluted 0.25% to Neat 1% Lidocaine for Trigger-Point Injections in Myofascial Pain Syndrome: A Prospective, Randomized, Double-Blinded Trial

Trigger-point injection with a mixture of commercially available 1% lidocaine in sterile distilled water at a ratio of 1:3 compared with 1% lidocaine alone resulted in better efficacy and less injection pain. This simple procedure may be suitable for treatments of a wide range of myofascial pain syndromes.