Feel tired; skin is all truly sensitive when his clothes touch his skin; blistering under arms, back, and legs / blisters under his armpits, thighs, and back; couldn't walk for 10 days; cannot sleep well at night; Rash; This is a spontaneous report from a contactable consumer (patient). A 35-year-old male patient received second dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, formulation: Solution for injection, Lot Number: EW0173, and Expiration date: Unknown), via an unspecified route of administration, administered in right arm on 06May2021 (at the age of 35-year-old) as dose 2, single for COVID-19 immunization. The patient medical history included chicken pox (when he was a child, he had the chicken pox). The patient had no other medical history or family medical history relevant to adverse events. The concomitant medications for patient were not reported. No other products. No investigation assessment was performed. No additional vaccines administered on same date of the Pfizer suspect. No prior Vaccinations (within 4 weeks). Adverse events following prior vaccination were unknown. The patient previously received first dose of BNT162B2 (PFIZER-BIONTECH COVID-19 VACCINE, formulation: Solution for injection, Lot Number: EW0161, and Expiration date: Unknown), via an unspecified route of administration, administered in right arm on 15Apr2021 (at the age of 35-year-old) as dose 1, single for COVID-19 immunization. The patient reported that, he had a severe reaction after the second dose of the COVID-19 vaccine. On 06May2021, the patient started to feel tired the same day that he received the second dose of the COVID-19 vaccine. Approximately two days after getting vaccine on 07May2021 or 08May2021, the patient developed blistering under arms, back, and legs / blisters under his armpits, thighs, and back. The patient reported that the blisters had appeared everywhere that the skin was folder. The patient reported that the blisters were quarter sized and when the blisters open up under his arms, there were smaller sizes too. The blisters were all over between his legs and back. The patient reported that he thought that the blisters were from swimming because 2 days before he received the second dose of the COVID-19 vaccine he was swimming. He thought that the blisters were from salt water because his shorts just hurt him. The blisters had been coming and were then removed. The patient reported that "he will have a scar" and the blister appeared again at different places. The blisters under his arm have different sizes and that he had blisters under his belly button. The patient reported that because of the blisters, he could not walk and "cannot sleep well at night" on an unspecified date in May2021. He needed a pillow between his knees at night because of the blisters. The patient reported that when he saw a bunch of blisters under his arm, he knew they were not from swimming. The patient reported that the blisters come and then go after 24-48 hours and could be ok, but the patient would have a new blister. The patient reported that the blisters had not stopped so far and every day he just observed more blisters on his skin. The patient reported that he "couldn't walk for 10 days" on an unknown date in May2021. On an unspecified date in May2021, the patient first realized the rash between his legs and did not notice anything under his arms. The rash was really big, about the size of his palm, and was gradually getting smaller. The patient reported that he must walk a lot during his work time, so when he was getting home, he just wanted to sleep. The patient reported that the rash and blisters felt like extreme chicken pox. The patient was feeling the same as he did when he was a child and had the chicken pox. The patient reported that his "skin is all truly sensitive when his clothes touch his skin" on an unspecified date in May2021. The patient reported that "there is going to be more blisters and a severe wound". The patient reported that he had the blisters for 10 days. The events were not resulted in emergency room or physician office. Relevant tests were none. The patient was told by a friend that the blisters could be from the Pfizer Covid-19 vaccine. The patient did not really have a primary care physician. He had not been checked by a physician in a few years since 2017. The patient reported that he did not know what to do. He inquired where he should go and if he should see some doctor. The patient reported that he was reading something and stated that the blisters might be something relating to AARI or immuno. He was not sure what the term was. The patient reported that whoever had the side effect were all women and those who had a pre-condition special issue. He inquired was he going to have some pre-condition medical history. The patient reported that he read something about people with autoimmune rheumatic disease can develop shingles from vaccine and he would like to know if that was true. He wanted to know how to manage side effects and if it could be due to the vaccine why his was having blistering. The outcome of the event rash was reported as resolving. The outcome of events "blistering under arms, back, and legs / blisters under his armpits, thighs, and back", and "feel tired" was reported as not resolved. The outcome of events "couldn't walk for 10 days", "cannot sleep well at night", and "skin is all truly sensitive when his clothes touch his skin" was unknown.  Follow-up attempts completed. No further information expected.