Difficulty thinking/concentrating/Caller states that she can't think straight, she is feeling spacy, like not focused; Difficulty thinking/concentrating/feeling spacey like she isn't focused; Flu like symptoms; Chills; Pain in joints; Nausea; Diarrhea; No appetite; Headaches; Extremely thirsty; Very sleepy; Feeling Sick; Feels Flu Like Symptoms; Not Been Feeling Well; Pain at the injection site/Left Arm Pain; feels tight like when she has a cyst and it is about to pop and it feels a little bit hot and tender to the touch; This is a spontaneous report received from a contactable consumer (patient). A 44-year-old female patient received second dose of BNT162B2 (lot number: FE3592) on 08Sep2021 14:00 (at age of 44-year-old) on left arm at single dose for COVID-19 immunization.  Medical history included Asthma, Allergies, Rheumatoid Arthritis and Acid Reflex. Heart Problems in Mom and Pacemaker. Concomitant medications were none. Historical vaccine included first does of BNT162B2 on 09Aug2021 (at age of 44-year-old, lot number: EW0185) for COVID-19 Immunization. Vaccination Facility Type was Other, At her employer. Vaccine Administered at Military Facility was No. Additional Vaccines Administered on Same Date of the Pfizer Suspect was None. Patient is now experiencing flu like symptoms such as chills, pain in joints, nausea, diarrhea, no appetite, headaches, extremely thirsty, very sleepy, pain at the injection site, difficulty thinking/concentrating, and feeling spacey like she isn't focused. She is still experiencing them. Caller states she has asthma and allergies, RA, and acid reflux, and has not been to the doctor or ER. Caller states she has been feeling sick since the day she got the shot, well she didn't get sick until the next day. Caller states she has not been feeling well, and she was told if she still feels sick to call this hotline to see if these are side effects from shot. Caller clarifies she feels flu like symptoms of chills, pain in her joints, nausea, diarrhea, she has no appetite, headaches, she is extremely sleepy, and very thirsty. Caller states she had pain on her left arm that night before she went to sleep. Caller states the arm pain is ongoing, it feels tight like when she has a cyst and it is about to pop and it feels a little bit hot and tender to the touch. Caller states her husband had to wake her up to eat soups and tea and then she ends up with diarrhea. Caller states her side effects are ongoing. but they come and go. Caller states the diarrhea keeps happening every time she eats. Caller states she is afraid to eat because she doesn't want to go to the bathroom, even water causes her to have diarrhea because she has nothing in her stomach. Caller states that she can't think straight, she is feeling spacy, like not focused. Caller states it is off an on. Caller states she like has to force herself to stay focused. Treatment: Tylenol and Water with Electrolytes, Gatorade. The events Arm Pain occurred in Evening. Event Flu Like Symptoms occurred in Morning. Events not result in Emergency Room or Physician Office. Prior Vaccinations (within 4 weeks) was None. AE(s) following prior vaccinations was None. Patient had Left Arm Pain; feels tight like when she has a cyst and it is about to pop and it feels a little bit hot and tender to the touch on 08Sep2021. Other events occurred on 09Sep2021. The outcome of the events was not recovered.