skin burning sensation/ that sensation in her thighs, her back, inside her rectum, stomach and arms/on legs; Stiffness at injection site; little sore; This is a spontaneous report from a contactable Consumer (patient). This 65-year-old female patient reported that received BNT162B2 (PFIZER-BIONTECH COVID-19 vaccine), first dose intramuscular, administered in Arm Left (injected into left arm in the muscle) on 10Feb2021 at 08:00 (Batch/Lot Number: EN5318; Expiration Date: 31May2021, Age at vaccination: 65-years) as dose 1, 0.3 ml single for COVID-19 immunisation. Medical history included sinus issues (diagnosed most of her adult life). Concomitant medication included unspecified mild blood pressure. No Family medical history. No previous history of all previous immunization with the Pfizer vaccine considered as suspect. No additional vaccines administered on same date of the Pfizer suspect. No Prior Vaccinations (within 4 weeks) and no AE following prior vaccinations. Caller received the first dose of the Pfizer-BioNtech Covid-19 vaccine on 10Feb2021. That afternoon she started experiencing a skin burning sensation, but it was not really bad, the next day she woke up with the same sensation, today she's still experiencing that sensation in her thighs, her back, inside her rectum, stomach and arms. She would like guidance on what to do, she states her doctor recommended her to take an adult Benadryl. The patient experienced skin burning on legs, thighs, back, rectum inside, stomach, and arms and Stiffness at injection site on 10Feb2021 in mid-afternoon. No ER or physician's office required. She received Pfizer COVID vaccine on 10Feb2021. Of course, she was expecting some swelling or soreness. It has been a little sore, but her concern was her skin was burning. Even inside her rectum was burning. She knows we all have little body itches here and there, but this was lasting 2 days. She does not get a burning sensation when she urinates. She did take some children's Benadryl. It woke her up last night with the same symptoms. She has not taken anymore. They told her to go get the adults one. She has taken it before and does not think it was the Benadryl. The dose she took was 1 tablespoon because she is older than children. It is probably less than dosage on cap. The dose on cap is 10ml, maybe she should have taken more. (Lot 048D9B Expiration Nov2021). Count size 4 ounces or 118ml. It was sealed and intact and she would be willing to send a sample. She felt like the injection was given in the muscle because she did not feel like it hit the bone. She took a mild blood pressure pill but does not feel it was relevant. No further details provided. She would like to know what she can do to help it. She went online and googled burning sensation and tens came up. She said this was when skin burns from the inside out. You start losing skin. She was not claiming that. She wants to take something to help this. Therapeutic measures were taken as a result of the events (Skin burning sensation and Stiffness shoulder). The outcome of the event 'Skin burning sensation' was not recovered, event Stiffness shoulder was recovering whereas for other event it was unknown.   Follow-up (11May2021): Follow-up attempts completed. No further information expected.