IRCT2014103115272N2 IRCT 2014-12-06 Shiraz University of Medical Sciences The effect of massage technique on pain and grip strength In patients with tension type headache The effect of trigger point release of patients with tension type headache on reduction of pain and grip force and grip endurance 2013-08-22 anticipated 28 Complete https://irct.ir/trial/14569 interventional Randomization: N/A, Blinding: Not blinded, Placebo: Used, Assignment: Single, Purpose: Treatment. N/A Tension type headache. Intervention 1: Using a hot pack for 10 min. Intervention 2: Post isometric relaxation technique used for muscles with trigger points. this technique is associated with eye movements and breathing pattern. During contraction, breathe out and look for the contraction and at rest, exhale done and look for opposite side.afterwards, examiner Put muscle in an elongated.