17 patients with acute mechanical, idiopathic, unilateral neck pain were randomly assigned into 1 of 2 groups to determine if trigger point dry needling had any effect on neck pain, pressure pain sensitivity, and cervical range of motion 1 week after intervention. Patients received either trigger point dry needling intervention or no intervention at all. The results of the study indicated that patients treated with 1 session of TrPDN experienced significantly greater decreases in neck pain, increases in pressure pain threshold, and increases in cervical range of motion when compared to those who received no intervention at all (1 week after intervention).