Getting really short of breath; lungs were shutting down; heat rash "everywhere on his arms, hands, feet, back and chest/prickly heat; itchy; hands and arms break out/whole body breaks out; have problems for rest of my life; screwed my whole body up; chickenpox; hands swell; cannot be in sunlight; hives; heart rate goes up/heart rate gets to 135; blisters; skin starts turning red/red rash type deal; The initial safety information received was reporting only non-serious adverse drug reaction(s), Upon receipt of follow-up information on 18Nov2021, this case now contains serious adverse reaction(s). Information processed together  This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP) from medical information team. The reporter is the patient.  A 31 year-old male patient received bnt162b2 (BNT162B2) (Batch/Lot number: unknown) as dose 2, single and administration date Mar2021 (Lot number: 1532817) as dose 1, single for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. The following information was reported: DYSPNOEA (hospitalization) with onset 2021, outcome "unknown", described as "Getting really short of breath"; RESPIRATORY FAILURE (hospitalization) with onset 2021, outcome "unknown", described as "lungs were shutting down"; MILIARIA (non-serious) with onset Jun2021, outcome "not recovered", described as "heat rash "everywhere on his arms, hands, feet, back and chest/prickly heat"; PRURITUS (non-serious) with onset 2021, outcome "not recovered", described as "itchy"; RASH (non-serious) with onset 2021, outcome "not recovered", described as "hands and arms break out/whole body breaks out"; LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (non-serious) with onset 2021, outcome "unknown", described as "have problems for rest of my life; screwed my whole body up"; VARICELLA (non-serious) with onset 2021, outcome "unknown", described as "chickenpox"; PERIPHERAL SWELLING (non-serious) with onset 2021, outcome "unknown", described as "hands swell"; PHOTOSENSITIVITY REACTION (non-serious) with onset 2021, outcome "unknown", described as "cannot be in sunlight"; URTICARIA (non-serious) with onset 2021, outcome "not recovered", described as "hives"; HEART RATE INCREASED (non-serious) with onset 2021, outcome "unknown", described as "heart rate goes up/heart rate gets to 135"; BLISTER (non-serious) with onset 2021, outcome "not recovered", described as "blisters"; RASH ERYTHEMATOUS (non-serious) with onset 2021, outcome "not recovered", described as "skin starts turning red/red rash type deal". The events "heat rash "everywhere on his arms, hands, feet, back and chest/prickly heat", "itchy", "hands and arms break out/whole body breaks out", "hands swell", "cannot be in sunlight", "hives", "heart rate goes up/heart rate gets to 135", "blisters" and "skin starts turning red/red rash type deal" were evaluated at the emergency room visit. The patient underwent the following laboratory tests and procedures: heart rate: (unspecified date) 135; laboratory test: (unspecified date) had no bacteria or anything; sars-cov-2 test: (unspecified date) negative, notes: He doesn't have it; skin test: (2021) unknown results. Therapeutic measures were taken as a result of dyspnea and respiratory failure and included Heliox which is a helium, oxygen, and a nebulizer to open the lungs. Clinical course: The patient reported he experienced a heat rash "everywhere on his arms, hands, feet, back and chest". The patient said the rash is known as "prickly heat" and described it as "kind of like chicken pox, its itchy" and that it looked like a "pimple with rash above it". The patient asked how to treat it. The patient has been having a heat rash ever since he got the vaccine.  He got it back in Jun2021.  He gets a heat rash everywhere, all over his arms, hands feet back and chest. He would like to know what does he do to treat it and he also asked if there have been reports of others with this symptom. He cannot work because hands and arms break out. He has already spoken to his Primary Care provider and gone to emergency room.  They have done skin test and no one knows what causes it. Only thing new he had was the Pfizer COVID vaccine. The rash goes everywhere and looks like he has chicken pox again. His hands swell and he cannot work. Since he is not able to work because of this, he would like compensation from Pfizer. The patient reported he is going to have problems for rest of his life from taking the vaccine and that it like screwed his whole body up. He stated that the COVID vaccine gave him an adverse side effect. On 18Nov2021, the patient reported that this has gotten worse. He gets bad hives and rash when he is in sunlight for 4 to 6 seconds. He gets hives and blisters everywhere. Recently he has been getting really short of breath. He has been to the ER and was tested for COVID and was negative, he doesn't have it. The doctors had no clue the lungs were shutting down. It started about a month and a half ago (unspecified date). He was in the ICU from that. They tested him for everything. He had no bacteria or anything. Then he found out that if his heart rate gets to 135, he starts breaking out in hives and rashes and that he knew was from the vaccine. He was given Heliox which is a helium, oxygen, and a nebulizer to open the lungs. The patient confirmed that has had two doses and they want him to get the booster dose. He doesn't want to do that because the first two about killed him. He got the first vaccine in Mar2021 (as provided by the reporter). He called CDC and did report. He was told it should go away in 6 to 8 days. 6 to 8 days went to weeks and then 6 to 8 months. Now he doesn't know what it is. He doesn't know what it is, but it comes form sunlight, heat, and heart rate. He gets a rash any of those ways. He will break out in hives in the shower. It is from the top of his head to bottom of his feet. The patient reported that his skin starts turning red and blistery. It is a red rash type deal. It itches.   Follow-up attempts are completed. No further information is expected.