Rash is where the leg meets and bends are her private area/it is like the groin area/It is a prickly feeling; rashes through legs, thighs, then moving up to her body with burning, itchy feeling and prickly like on top of the rash like painful bad sunburn; burning and prickly; legs felt itchy like dry skin itchy; arms started to get red as a sunburn; This is a spontaneous report from a contactable consumer or other non hcp (patient herself) from a Pfizer sponsored Program. A 57-years-old female patient received bnt162b2 (BNT162B2, formulation: solution for injection, lot number: not reported, expiry date: not reported) via an unspecified route of administration on 10Mar2021 as dose 1, single for covid-19 immunization. The patient medical history and concomitant medications were not reported. On 10Mar2021, the patient experienced arms started to get red as a sunburn, legs felt itchy like dry skin itchy, rashes through legs, thighs, then moving up to her body with burning, itchy feeling and prickly like on top of the rash like painful bad sunburn, burning and prickly, rash is where the leg meets and bends are her private area/it is like the groin area/it is a prickly feeling. She explained as she was sitting in the waiting area post-vaccination, her arms started to get red as a sunburn. She called the nurse who confirmed the redness and asked her to wait for 20 minutes. She explained the redness went away and she returned home. On 14Mar2021, when she came out of the shower, her legs felt itchy like she has dry. Put lotion on and did use a new soap. Doesn't normally buy this soap. Felt better after lotion. Put lotion on legs from her knees down in calf area. She never had reactions to soaps and anything like that. On 15Mar2021after work she took a shower. Shower was not hot, but lukewarm to cold in temperature. Washed herself with new soap. Got out of shower and put jeans on and was sitting down. Noticed her skin felt like it was burning. Felt prickly. Took jeans off and skin looked like she had a sunburn all over her legs. Stretches from her ankles to her thighs and onto her buttocks. Rash feel a little hot to the touch and like she has been in the sun for too long. Feels like a sunburn and was a rash within the skin. There were no bumps on top of the skin. It was all over her legs and buttocks. Doesn't see it form the waist and up. Rash was not on her face. Rash was on legs, buttocks, and down to ankles. It was painful. She explained the next day the prickly burning sensation persisted and the rash extended all the way to her thighs and buttocks. She explained: the cloths were making it worst as they were rubbing against her skin, it was especially more severe on the back and side her knees because of the bending, and on her buttocks, where it's meeting the chair. She said her rash was getting more and more irritated and today it looks like it's spreading to the top of [her] buttocks. She had spoken with an allergist who mentioned she should not react to the COVID-19 vaccine, and therefore she might ask him further guidance. Outcome of the events was reported as recovered for erythema and unknown for rest all the events.   No follow-up attempts are possible; information about lot/batch number cannot be requested.