IRCT20231107059979N1 IRCT 2023-12-09 Tehran University of Medical Sciences Effect of strain counterstrain treatment on shoulder pain and range of motion Studying the effect of strain counterstrain therapy on shoulder pain and range of motion in People with breast cancer after mastectomy surgery with chronic active trigger point pain 2023-12-08 anticipated 38 Complete https://irct.ir/trial/73658 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Factorial, Purpose: Supportive, Randomization description: Simple randomization (two patients who are very similar in terms of age, scar area, pain intensity, and body mass index are assigned to one of the control and test groups by tossing a coin.). N/A unilateral mastectomy. Intervention 1: Intervention group: In this group, in addition to the methods in the control group from the first session the strain counterstrain method will be used for the 5 more active trigger points in people. Strain counterstrain method: In this method, the trigger point is identified by touch, and the therapist increases the pressure while still touching it so that the patient reports the onset of pain. Then passively put the muscle in a comfortable (shortened) position to reduce 70% of the pain and maintain a gentle touch on the trigger point, after 90 seconds the release is done and the therapist opens the patient to the resting position. This intervention will be repeated twice for each trigger point. Intervention 2: Control group: In the control group of subjects, after entering the study, people will be taught exercises and people will do the exercises. Start the exercises with 5 minutes of walking, then perform active stretching of the neck and upper trunk, flexion and extension (two repetitions of 20 seconds), perform active movement of the cervical spine for flexion, extension, and rotation (one set and ten repetitions). Performing active movement of the upper limbs for flexion, extension, abduction and adduction of the shoulder (two sets and ten repetitions) and finally performing relaxation exercises with deep breathing for 5 minutes (total duration of the exercises is 25 minutes). Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is There is no further information