Swollen lymph nodes; she was exhausted; Headache; tremendous burning in her body from the inside; Sore throat.; She had more sensation; She had back pain with the second shot so she wasn't too concerned about that.; Hands and feet were ice cold; Elevated Blood pressure; Weakness; This is a spontaneous report from a contactable consumer (patient). A 74-year-old female patient received booster dose of BNT162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE; Lot Number: 341058A), via an unspecified route of administration, administered on 22Oct2021 at 18:00 (at the age of 74 years old) as a single dose for COVID-19 immunisation. Medical history was none reported. Concomitant products were none reported. Patient received Flu shot 2 weeks prior to vaccination on unspecified date in Oct2021 at the age of 74 years old. The patient received first dose of BNT162B2 (PFIZ-ER-BIONTECH COVID-19 VACCINE, Lot number: EL8982, Expiration date: Unspecified date in May2021) on 21Jan2021 and second dose of BNT162B2 (PFIZ-ER-BIONTECH COVID-19 VACCINE, Lot number: EL9269, Expiration date: Unspecified date in May2021) on 11Feb2021 for covid-19 immunisation at the age of 73 years old. On 23Oct2021 at 15:00 the patient experienced that tremendous burning in her body from the inside, hands and feet were ice cold, elevated Blood pressure, weakness and on 24Oct2021 experienced Swollen lymph nodes, Headache, Back pain. Reporetr received the COVID booster shot on Friday report the reactions she had after booster shot on Friday 22Oct2021. She did not have any reaction until 21 hours later. She didn't experience it after the first two COVID vaccines. She had a tremendous burning in her body from the inside. She had a headache and sore throat. The most important sensation is the burning on the inside. All the while, her hands and feet were ice cold. She had more sensation. The inside burning was unbelievable, and it lasted all night. Then, she couldn't keep her hands and feet warm. She had elevated Blood pressure, and she has never had that. She was weak. She expected some reaction, but she didn't expect her inside burning that was scary. Now she has noticed swollen lymph nodes on her arm where the shot was administered. She didn't have this the first time. At first, she was just feeling nothing and then it started with her throat first. Then, she got back pain. She had back pain with the second shot, so she wasn't too concerned about that. She also had light headaches, but she can take some pain. She is pretty pain resilient. She did take Tylenol and drank fluids. Then, she went to bed and that is when she started with absolute horrible burning up inside. This was on 23Oct2021.It lasted around 12 hours during the whole night. The next day, Sunday, she was exhausted. She is most concerned about the lymph nodes being very swollen. She did get her flu shot two weeks before. She has a friend who is a physician, and he said it is unusual to have lymph node swelling. He told her to report it to Pfizer. She noticed the Lymph nodes yesterday evening, 24Oct2021. It is like a really big swollen area in her armpit. She took a picture and sent it to the doctor, and they said it looks like swollen lymph nodes. The patient underwent lab tests and procedures which included Blood pressure measurement on unspecified date. The patient was not visited physician office or emergency room. The outcome of the events tremendous burning in her body from the inside, hands and feet were ice cold, elevated Blood pressure, weakness, headache was resolved on unspecified date in Oct2021 while tremendous burning in her body from the inside was resolved on 24Oct2021 while Swollen lymph nodes was not resolved while Sore throat, more sensation, exhausted was unknown. Follow-up attempts are completed. No further information is expected.