when her muscle flexes, then the lump gets irritated/the Covid arm irritates her arm all the way back to the back of her shoulder blades kind of under her armpit; whole arm is just weak and really sore; her arm all the way back to the back of her shoulder blades kind of under her armpit; lump inside of her arm; lump formed at the injection site; pain her left arm/arm is really painful and the pain is not going away; she experienced a pain in her left arm at the injection site; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 64 year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 19Feb2021 09:00 (Lot number: EN6200) at the age of 64 years as dose 2, single for covid-19 immunisation. Relevant medical history included: "Bad back", start date: 2009 (ongoing), notes: Start date-??-??-2009; "couldn't sleep" (unspecified if ongoing), notes: she couldn't sleep on that side; "pneumonia" (unspecified if ongoing), notes: she's had pneumonia in her past life; "she walks with a cane" (unspecified if ongoing). Concomitant medication(s) included: HYDROCODONE taken for back pain, start date: 2012 (ongoing); MORPHINE taken for back pain, start date: 2015 (ongoing). Vaccination history included: Bnt162b2 (first dose, Lot Number: EL9261, Anatomical Location: Right arm, Outcome of reaction/event at the time of last observation: Recovered/Resolved), administration date: 29Jan2021, for COVID-19 Immunization, reaction(s): "Little bit of chills", "Pain from Covid arm", "Fever"; Flu vaccine (flu vaccine), administration date: 2020, for Immunization, reaction(s): "she didn't feel anything from the flu vaccine"; Pneumonia vaccine (pneumonia vaccine a few years ago but she didn't have any effects), for Pneumonia, reaction(s): "she didn't have any effects". The following information was reported: PAIN IN EXTREMITY (non-serious) with onset 19Feb2021, outcome "not recovered", described as "pain her left arm/arm is really painful and the pain is not going away"; VACCINATION SITE MASS (non-serious) with onset 23Feb2021, outcome "not recovered", described as "lump formed at the injection site"; SKIN IRRITATION (non-serious), outcome "unknown", described as "when her muscle flexes, then the lump gets irritated/the Covid arm irritates her arm all the way back to the back of her shoulder blades kind of under her armpit"; MUSCULAR WEAKNESS (non-serious), outcome "unknown", described as "whole arm is just weak and really sore"; VACCINATION SITE PAIN (non-serious) with onset 19Feb2021, outcome "not recovered", described as "she experienced a pain in her left arm at the injection site"; LIMB MASS (non-serious) with onset 23Feb2021, outcome "unknown", described as "lump inside of her arm"; AXILLARY PAIN (non-serious), outcome "unknown", described as "her arm all the way back to the back of her shoulder blades kind of under her armpit". The events "pain her left arm/arm is really painful and the pain is not going away", "lump formed at the injection site", "when her muscle flexes, then the lump gets irritated/the covid arm irritates her arm all the way back to the back of her shoulder blades kind of under her armpit", "whole arm is just weak and really sore", "she experienced a pain in her left arm at the injection site", "lump inside of her arm" and "her arm all the way back to the back of her shoulder blades kind of under her armpit" 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 pain in extremity, vaccination site mass, skin irritation, vaccination site pain, limb mass, axillary pain.  Additional Information: Concomitant Products Hydrocodone: Caller reported that she takes the hydrocodone in the morning, afternoon, later afternoon, evening, and sometimes if she woke up at night she had to take it. Concomitant Products Morphine: Caller reported that she was not sure of the dosage of her morphine but that it is the lowest dose. She had back surgery and that the back surgery did not go very well. Caller reported that the surgery did something to her nerves on her left leg that went from her back to her lower left leg. She walks with a cane and her back hurts all the time. She just took the pain medicine so she can have some form of a life. She had heart surgery, so she doesn't want to get Covid-19. She did not take any aspirin following the Covid-19 vaccine because she did not want it to interfere with her immune system. She did not take any pain medication for 4 days after the Covid-19 vaccine to make sure that her immune system would interact with the vaccine naturally. Adverse events not resulted into emergency room visit. There was no vaccine taken prior vaccinations (within 4 weeks). There were no adverse events following prior vaccinations. There was no family medical history relevant to adverse events.  Follow-up attempts completed. No further information expected.