she just about died/she thought she was dying; stiff neck/ankles are stiff/stiffness in left side of neck and arm and shoulder blade first; it went down her spine and then hit her in sciatic area; she got the booster of the Pfizer Covid vaccine; sore arm; phlebitis in both legs; cramping/muscle cramping; head went red; her face and hands were swollen; her face and hands were swollen; blood pressure and pulse were extremely low; blood pressure and pulse were extremely low; couldn't breathe well; coughing; she was just very weak and sensitive; fell; it was an allergic reaction; Feels like every tendon are all dried up; cant get her body moving; brain fog; she felt the stiffness and pain in left side of neck and arm and shoulder blade first; arm is still swollen where she had vaccine; she felt the stiffness and pain in left side of neck and arm and shoulder blade first; This is a spontaneous report received from a contactable consumer (patient). A 60-years-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 VACCINE), dose 3 via an unspecified route of administration, administered in Arm Right on 25Oct2021 19:25 (Lot Number: FF23593) at age of 60 years old as DOSE 3 (BOOSTER), SINGLE for covid-19 immunisation.  Medical history included ongoing fibromyalgia, rheumatoid arthritis and a non descript immune system, states this was as a kid, but as she got older she got better. Concomitant medication(s) included influenza vaccine (FLU) taken for an unspecified indication on 18Oct2021. She is usually very sensitive to the flu shots. Historical vaccine included the first dose of BNT162B2 (LOT: ER2613) in Arm Right on 17Mar2021 at age of 59 years old for COVID-19 Immunization and experienced first dose hit her the same way the first dose did in neck and shoulders, and second dose of BNT162B2 on 07Apr2021 in Arm Right at age of 59 years old for COVID-19 Immunization. The patient got the booster of the Pfizer Covid vaccine, states she just about died. She got the vaccine on 25Oct2021, started out with just a normal reaction, all the normal things, sore arm and all that, states that started going away on third day, then she had a stiff neck, then it went down her spine and then hit her in sciatic area, and 4.5 days later, she thought she had phlebitis in both legs, states she had cramping that was excruciating, then her arms and back went out, she was crippled, her head went red, her face was swollen, her face and hands were swollen, states they looked like mickey mouse hands, her blood pressure and pulse were extremely low,  she thought she was dying, states did not go to the emergency room, states she laid there and thought, waited until Monday and she says she was getting a little better, states she tripled her potassium and magnesium supplements to help, she went to doctor, first saw her cardiologist and they did an EKG and everything was fine. The patient couldn't breathe well due to coughing and muscle cramping around her chest, esophagus was larger. She was dropping things, she was weak, she fell, hit her head. She knows it was an allergic reaction. Feels like every tendon are all dried up, creaky and taking gabapentin and meloxicam, cant get her body moving, minor stretches are causing to injure something, ankles are stiff, feels like someone put glue in all of her joints. States arm is still swollen where she had vaccine, had some brain fog, some has lifted and is doing a little better. The patient was just very weak and sensitive, like if she touches something, like normally she would use heat or cold, or massage , but it just makes it worse right now. She felt the stiffness and pain in left side of neck and arm and shoulder blade first. She is still having bad muscle cramps and not getting around as well but doing okay. Clarifies she has improved. Clarifies this all started almost immediately after the vaccine (unspecified).  Events resulted in physician office visit. The outcome was recovering.