From my left ear down to my shoulder was very painful; My left jaw was very painful I could barely open it; My arm where I had it, it was red, it was swollen and it was hot; My arm where I had it, it was red, it was swollen and it was hot; My arm where I had it, it was red, it was swollen and it was hot; It was all the way from my left neck, all the way to my ear it was pain; From my left ear down to my shoulder was very painful; I had developed a very bad case of TMJ; Muscle weakness; This is a spontaneous report received from a contactable reporter(s) (Other HCP) from medical information team. The reporter is the patient. Other Case identifier(s): US-PFIZER INC-202101317769 (Pfizer).  A 65 year-old female patient received bnt162b2 (BNT162B2), administration date 29Sep2021 (Lot number: ER8729) at the age of 65 years as dose 3 (booster), single for covid-19 immunisation. Relevant medical history included: "Diabetic" (unspecified if ongoing), notes: Verbatim: Diabetic. Concomitant medication(s) included: INSULIN; FARXIGA. Vaccination history included: Bnt162b2 (dose: 01), for COVID-19 Immunization; Bnt162b2 (dose: 02), for COVID-19 Immunization. The following information was reported: VACCINATION SITE ERYTHEMA (non-serious), VACCINATION SITE SWELLING (non-serious), VACCINATION SITE WARMTH (non-serious) all with onset 30Sep2021, outcome "unknown" and all described as "My arm where I had it, it was red, it was swollen and it was hot"; NECK PAIN (non-serious) with onset 30Sep2021, outcome "unknown", described as "It was all the way from my left neck, all the way to my ear it was pain"; EAR PAIN (non-serious) with onset 30Sep2021, outcome "unknown", ARTHRALGIA (non-serious) with onset 01Oct2021, outcome "unknown" and all described as "From my left ear down to my shoulder was very painful"; PAIN IN JAW (non-serious) with onset 01Oct2021, outcome "unknown", described as "My left jaw was very painful I could barely open it"; TEMPOROMANDIBULAR JOINT SYNDROME (non-serious) with onset 2021, outcome "unknown", described as "I had developed a very bad case of TMJ"; MUSCULAR WEAKNESS (non-serious) with onset 2021, outcome "unknown", described as "Muscle weakness". The events "my arm where i had it, it was red, it was swollen and it was hot", "my arm where i had it, it was red, it was swollen and it was hot", "my arm where i had it, it was red, it was swollen and it was hot", "it was all the way from my left neck, all the way to my ear it was pain", "from my left ear down to my shoulder was very painful", "from my left ear down to my shoulder was very painful", "my left jaw was very painful i could barely open it" and "i had developed a very bad case of tmj" were evaluated at the physician office visit. Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of vaccination site erythema, vaccination site swelling, vaccination site warmth, neck pain, ear pain, arthralgia, pain in jaw, temporomandibular joint syndrome, muscular weakness. Additional information: Investigation assessment done. Consumer (Nurse) stated that she had Pfizer Booster (Unspecified Booster Shot) a day before yesterday. She woke up yesterday morning, her arm where she had it, it was red, it was swollen and it was hot which was what she expected. It was all the way from her left neck, all the way to her ear it was pain (incomplete sentence). She had it at her left arm and she woke up the next morning from her left ear down to her shoulder was very painful. Her left jaw was very painful, she could barely open it, end up going to the ENT doctor and it was everything was just all one side, the left side where she had the vaccination and he told her that she had developed a very bad case of TMJ. It was all on the left side, nothing on the right. It was all left side. Was that a normal side effect. Muscle weakness could be a side effect of it but it was all on left side and this was something that she never had before. Consumer was informed about Pfizer Medical Information Department. Consumer was suggested to consult healthcare provider or visit to the nearest hospital. Consumer stated, she went to her healthcare provider and was given three injections (Treatment), one in her temple area, one in her mandible area and one just above her thoracic going in (further clarification was unknown). Consumer takes about 13 medications, Insulin, Farxiga. Blood sugar, Cholesterol, had that done today. Causality: Consumer stated as yes. (Not appropriately clarified for specific event, hence not marked in tab). No product complaint to report. Medical information request.  No follow-up attempts are possible. No further information is expected.