gland swelling in back of neck, near her throat, her armpit area, above her ribcage in that area, down in her groin; Headache; Muscle pain; Chills; Joint pain; tiredness; bruisey; had flu-ish symptoms; little sore arm; felt a sting; This is a spontaneous report from a contactable consumer (patient). A 46-years-old female patient received bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE; Solution for injection, Lot Number: EL9262) via intramuscularly administered in Arm Left on 21Jan2021 around noon (at the age of 46-years-old) as a DOSE 1, SINGLE for COVID-19 immunisation. Additional Vaccines Administered on Same Date of the Pfizer Suspect was None. Prior Vaccinations (within 4 weeks) were None. Patient's Medical History (including any illness at time of vaccination) reported as a mitochondrial disease, it's a genetic, on a family level, where she needed a little more time to get better over things. So, lymph nodes she was familiar with. However, she knew the swelling was coming from the COVID-19 vaccine, swelling just does not happen unless there was something going on. Concomitant medication was none. On 21Jan2021, the patient experienced gland swelling in back of neck, near her throat, her armpit area, above her ribcage in that area, down in her groin, headache, muscle pain, chills, joint pain, tiredness, bruisey, had fluish symptoms, little sore arm and felt a sting. The reporter wanted to ask a couple quick hypothetical questions first before she decided to give any of her information. She wanted to know on the first round versus second round of the COVID-19 vaccine, was gland swelling in back of neck, under arms, groin, and all over big enough of an issue to be concerned not to get a second one or could one go ahead and get it or not. She was just trying to double check. She was lined up as a school worker to get her second shot and she didn't know if she should worry about getting her next shot. She took a Benadryl, and it took 24 hours for to feel completely okay. She also experienced muscle aches, headache, chills. The patient explained it didn't say on the paperwork based on her symptoms, to not have more of the shot. She was feeling pretty okay about it. She didn't have time to call a doctor before tomorrow (date unspecified). The enlarged glands were not listed in the severe section of the paperwork. She didn't have difficulty breathing or swelling in the face. She just thought her mask was irritating. Everything else was okay. She was hoping to still do the next shot tomorrow. The patient explained after the vaccine, they have a sit and wait 15 minutes. The injection didn't even hurt. She didn't have any feeling in her arm at all, her arm felt really good at that point when she first received the injection. However, she stayed a full 30 minutes because she had a little bit of a reaction, her family tends to. After 10-15 minutes of receiving the vaccine, she started feeling sore and swelling right in the back of her neck gland area. When she could turn her neck that way, she could feel it. When she turned her head the other way, she didn't feel anything. She explained it was the gland on the right side, opposite of the side she received the injection in. It was the only thing to bother her within the 15-30 minutes of sitting there. When she left after 30 minutes, she still had that bother, so she took half a Benadryl, Tylenol and Motrin. she made the comment some of her friends took Benadryl after because it was bothering their throats. No further details provided. She confirmed she has none of the Benadryl, Tylenol or Motrin to provide any NDC/UPC, Lot number or expiry date from. The patient explained she was very sensitive to Benadryl, so she only took half. She took the other half later and took more. She stated she definitely had fluish symptoms. She had a headache, muscle pain, chills and then more of the glands started to be a bother. She just dealt with it. They all said she would feel more the next round, but she was thinking she was still okay to get the second vaccine. It wasn't her throat or anything. The patient stated one gland was near, like towards the side of her neck and throat. The glands were just all over when it started to seem a little swollen, she could feel it. She had swollen glands in her armpit area, above her ribcage in that area, down in her groin. This is within 24 hours of receiving the vaccine all of this happen. In addition, she experienced tiredness, headache, a little chill that night, and joint pain. She never had a fever; she didn't get swelling or redness at the injection or nausea. It was just her lymph nodes, and a little sore arm. Everything was fine with her sore arm until now. She can move her arm, but it feels like deep in the injection site, she felt a sting and its kind of bothersome. She can put up with it. It seemed better, but she noticed this kind of sting in the area of her arm three weeks out. It's just like when she puts her arm in different positions, she can feel this sting. It's kind of "bruisey" if you touch it there. That's where it has been. However, it doesn't show at all. It's not swollen. It just depends on certain positions. patient explained it didn't feel that way after she had the injection, it was just the usual. Now, it is a different pain, its deeper, a little more tender. She saw the paperwork and felt pretty okay since she read, she may have some of the side effects reported and it as showed list of severe reactions and she didn't fall into the list severe. She didn't call anybody or anything. Patient just figured she would help with data by calling today and also, she wants to make sure it's okay to do the next vaccine. Therapeutic measures were taken as a result of gland swelling in back of neck, near her throat, her armpit area, above her ribcage in that area, down in her groin, headache, muscle pain, chills, joint pain and tiredness. Relevant Tests done were none. Event did not require a visit to, Emergency Room or Physician Office. Outcome of all the events were unknown.  Follow-up (12May2021): Follow-up attempts completed. No further information expected.