I'm so sick; my whole back ended up in emergency room the next day because I could not walk and move; all the muscles and the 'chi-chis' around my back are swollen; knees hurt; couldn't stand or walk; my whole back ended up in emergency room the next day because I could not walk and move; Headache; Feverish; body hurt, her joints didn't feel right; Pain/I am in so much pain I literally can not stand it; so much in pain with my back; chills; my back seized up and took me to the floor; This is a spontaneous report from a contactable consumer (patient). A 53-years-old female patient received BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE), dose 1 via an unspecified route of administration, administered in left arm on 24Aug2021 (Lot Number: EW0217) at the age of 53-years-old as single dose for covid-19 immunisation. Medical history was none. Patient was a very healthy person. There were no concomitant medications. No other vaccine prior vaccination 4 weeks. Patient landed herself in emergency room and she was still suffering. Patient was so sick, she had been so sick. Patient had not done a second shot yet and she does not think she wants to. On 25Aug2021, starting early in the morning she had a horrible headache, feverish, her body hurt, her joints didn't feel right and later that evening she was literally walking and her back seized up and took her to the floor. She couldn't stand or walk or sit or anything and on 26Aug2021, she drove herself because she was a single mom but nobody helped her. She had to drive herself to the ER because she was in so much in pain with her back and it cost her a 100 dollars for the ER visit. Got shot up with Prednisone and Toradol and still have to see the back doctor which she had not yet. She was gonna to have an MRI and to figure out what's wrong with back. They gave patient three pills of Prednisone and shot her up with Toradol and now she was gonna have to have an MRI because it was not fixed and then probably gonna have to go from there to figure out what else she needed to have done because she was in a lot of pain and now she was taking Hydrocodone for the pain and have been sick been literally sick for the 5 days. Patient received vaccine and believed was 25Aug2021 literally after 24 hours, she had to go home from work, had a headache, chills and basically turn back out she took a stab and her whole back ended up in emergency room the next day because she could not walk and move. Now she had an MRI to see what was wrong with back. Patient can tell a 100 percent this was due to having the Pfizer COVID shot. Now she had to take a high round of Pregnazon (Intent: Treatment for AE) and then she had to have another shot of Toradol (Intent: Treatment for AE) which was an anti inflammatory because all the muscles and the 'chi-chis' around back are swollen, her knees hurt, knees normally pop but now they are popping all the time and they hurt, she was still struggling. Patient was waiting for the doctor to call her in the morning to see her either a back doctor but now she had to go in for them what she asked them to pick back but now she had to get on the plane in seven days and she was in so much pain, she literally cannot stand it. Outcome of the events was unknown.  Follow-up attempts are completed. No further information is expected.