Increasing pain in my deltoid muscle; I can hardly move my arm; its begin to irradiating to my neck its pulsating pain and movement is difficult there is no comfortable position for my arm right now; Increasing pain in my deltoid muscle; I can hardly move my arm; its begin to irradiating to my neck its pulsating pain and movement is difficult there is no comfortable position for my arm right now; its begin to irradiating to my neck its pulsating pain; pain or soreness was localized on the deltoid/expanded up into the trapezius/expand into the neck region and the pain or soreness also warm; Soreness in the arm which has increased from may be 2 hours after the vaccine up until now and it continues to increase; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 63-year-old female patient received bnt162b2 omi xbb.1.5 (COMIRNATY (2023-2024 FORMULA)), on 02Oct2023 at 16:30 as dose number unknown (booster), single (Batch/Lot number: unknown) at the age of 63 years for covid-19 immunisation. The patient had no relevant medical history. There were no concomitant medications. Vaccination history included: Covid-19 vaccine (Primary immunization series completed, Manufacturer: Unknown), for COVID-19 immunization. The following information was reported: PAIN IN EXTREMITY (non-serious) with onset 02Oct2023 at 18:30, outcome "not recovered", described as "Soreness in the arm which has increased from may be 2 hours after the vaccine up until now and it continues to increase"; MYALGIA (non-serious), JOINT RANGE OF MOTION DECREASED (non-serious) all with onset 02Oct2023 at 21:30, outcome "not recovered" and all described as "Increasing pain in my deltoid muscle; I can hardly move my arm; its begin to irradiating to my neck its pulsating pain and movement is difficult there is no comfortable position for my arm right now"; NECK PAIN (non-serious) with onset 02Oct2023 at 21:30, outcome "not recovered", described as "its begin to irradiating to my neck its pulsating pain"; FEELING HOT (non-serious) with onset 02Oct2023 at 21:30, outcome "not recovered", described as "pain or soreness was localized on the deltoid/expanded up into the trapezius/expand into the neck region and the pain or soreness also warm". Therapeutic measures were not taken as a result of myalgia, joint range of motion decreased, pain in extremity, neck pain, feeling hot. Additional information: Patient has had all shot up until now and never had any problem, yet now its been about 5 hours and have increasing pain in deltoid muscle, can hardly move arm, its begin to irradiating to my neck its pulsating pain and movement is difficult there was no comfortable position for arm right now. Her question is its getting worse and worse, so was concerned because she never had a reaction like this at all. The side effects at this time or soreness in the arm which has increased from may be 2 hours after the vaccine up until now and it continues to increase, the pain or soreness was localized on the deltoid and now it has expanded up into the trapezius and it starts to expand into the neck region and the pain or soreness also warm and it is not quite tender.   The information on the batch/lot number for bnt162b2 omi xbb.1.5 has been requested and will be submitted if and when received.