inflammation on the left side (side that received the vaccine).; pain on the left side (side that received the vaccine)./Left side of the body has an overall ache/tightness; Left side of the body has an overall ache/tightness; only on the left side of the body with the left leg and arm feeling a little weaker with a slight ache; only on the left side of the body with the left leg and arm feeling a little weaker with a slight ache; the joints on the left side has a little twinge; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the patient.  A 37 year-old female patient (not pregnant) received bnt162b2 (BNT162B2), administered in arm left, administration date 15Nov2021 16:00 (Lot number: fg3527) at the age of 37 years as dose 1, single for covid-19 immunisation. Relevant medical history included: "known allergies: several but had seen an allergist prior to the vaccine to see if there would be AEs" (unspecified if ongoing). Concomitant medication(s) included: EXCEDRIN [ACETYLSALICYLIC ACID;CAFFEINE;PARACETAMOL;SALICYLAMIDE]; METHYLPHENIDATE; IBUPROFEN and multivitamin. The following information was reported: INFLAMMATION (non-serious), outcome "unknown", described as "inflammation on the left side (side that received the vaccine)."; PAIN (non-serious) with onset 15Nov2021 16:15, outcome "not recovered", described as "pain on the left side (side that received the vaccine)./Left side of the body has an overall ache/tightness"; MUSCLE TIGHTNESS (non-serious) with onset 15Nov2021 16:15, outcome "not recovered", described as "Left side of the body has an overall ache/tightness"; MUSCULAR WEAKNESS (non-serious), PAIN IN EXTREMITY (non-serious) all with onset 15Nov2021 16:15, outcome "not recovered" and all described as "only on the left side of the body with the left leg and arm feeling a little weaker with a slight ache"; ARTHRALGIA (non-serious) with onset 15Nov2021 16:15, outcome "not recovered", described as "the joints on the left side has a little twinge". The events "inflammation on the left side (side that received the vaccine)." and "pain on the left side (side that received the vaccine)./left side of the body has an overall ache/tightness" were evaluated at the physician office visit and emergency room visit. Therapeutic measures were taken as a result of inflammation, pain. Therapeutic measures were not taken as a result of muscle tightness, muscular weakness, pain in extremity, arthralgia.  Additional Information: The patient did not receive any other vaccines within 4 weeks prior to the COVID vaccine. The patient did not diagnosed with COVID-19 prior to vaccination. The patient had not been tested for COVID-19 since the vaccination. Adverse event: Left side of the body has an overall ache/tightness to it. It is only on the left side of the body with the left leg and arm feeling a little weaker with a slight ache. The joints on the left side has a little twinge to them similar to when you overdo a work out but instead of whole body as if there is a line going down the center of her from the top of her head down to feet. The events were with onset date 15Nov2021 04:15 PM, reported as non-serious. No treatment received. As of information received on 04Feb2022, it reported symptoms were persistent and she had been on anti-inflammatory medication since the vaccine due to inflammation and pain on the left side (Which is the side that received the vaccine). This resulted in ER visit and multiple Dr. appoinments as well as on going care.  Follow-up attempts are completed. No further information is expected.