extreme fatigue; arthritis pain has been worse/Arthritis Seems Worse; Joint Discomfort; Stiffness; having a lot of pain in the left arm, he couldn't get to sleep from the pain; having a lot of pain in the left arm, he couldn't get to sleep from the pain; This is a spontaneous report from a contactable consumer (Patient). A 71-years-old male patient received first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE, Solution for injection, Batch/Lot number was not reported), via an unspecified route of administration, administered in Arm Left on 21Feb2021 as DOSE 1, SINGLE for covid-19 immunisation. Medical history included Chronic Epstein Barr Virus , arthritis (ongoing). Patient had no concomitant medications. On an unspecified date, the patient experienced extreme fatigue, arthritis pain has been worse/arthritis seems worse, having a lot of pain in the left arm, joint discomfort, stiffness. On 06Mar2021, he couldn't get to sleep from the pain, having a lot of pain in the left arm, he couldn't get to sleep from the pain. Caller stated he spoke to someone earlier today who he reported his side effects to after receiving the Pfizer COVID vaccine and he was given our number to answer his medical questions. Caller states he has been experiencing extreme fatigue that is very overwhelming since receiving the first dose three weeks ago and he is scheduled for the second dose this coming Monday but he is thinking about canceling his appointment due to the extreme fatigue. Caller states his arthritis pain has been worse as well since receiving the COVID vaccine. Caller states he also has chronic Epstein virus that he has had since a child and it was reactivated for a couple years and he has been trying to get an appointment with his physician to see about but they are too busy. Caller would like to know if his extreme fatigue is normal and if he should receive the second dose of the vaccine. Caller states that it will be three weeks on Monday since the first dose and knows one side effect is fatigue, so he expected it for a short while but it is overwhelming and he can hardly get out of bed or do anything. Caller states that he is worried about it with his Chronic Epstein Barr Virus. States he has had it for a couple of years now and has fatigue but not to this degree. Caller clarified the way they monitor it is antigens that fight the virus just like with Covid 19; they have them measured, the higher they are, the early antigen indicates an active infection trying to fight the virus. Stated that he tried to get in today to see the doctor but he was unable. States he thinks it is more than that though, it is worse. Stated that his levels may be worse than they have ever been. Caller states that this is exacerbating an existing condition. Caller stated based on this, he scheduled on Monday for his second vaccine and thinks he is going to by pass on it. Maybe if he waits and feels better. He would like to speak to someone about it. Overwhelming fatigue and he can hardly get out of bed or do anything AE: stated that it started three to four days after the vaccine. Clarified that he doesn't think it is related but he started having a lot of pain in the left arm. It started five to six days ago. States that he couldn't get to sleep and waited till 2:00 a.m. and went to the emergency room. States that they couldn't find anything out. Clarifies that he is talking about something that was 2 weeks after the vaccine. States that he guesses there is a chance it is related. Friday 6Mar2021, got back home and it was 5:30 a.m. and he do not really get to sleep and by then the arm pain had dissipated. Stated that he has arthritis and that has seemed worse, seems to have more joint discomfort and stiffness. States that 10 days ago it started. The clinical outcome of events having a lot of pain in the left arm, he couldn't get to sleep from the pain were recovered on 06Mar2021 and other events were not recovered.  No follow-up attempts are Possible. Information on Lot/batch number cannot be obtained.