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It is common to feel some side effects after getting the corona vaccine, which get better on their own in a few days. Most people feel a sharp pain in the arm at the place where the vaccine is administered. The pain persists for several days with swelling in the arm. The side effect of the vaccine is visible in many ways in the body. In all these side effects, almost everyone has pain in the hand. Pain and swelling in the arm may indicate how your body responds to the vaccine.   The body takes it as an injury to the arm, as in a cut or bleeding, and sends immune cells to relax the blood vessels in the arm. Experts call this reaction of the vaccine 'reactogenicity'.  Vaccine Liquid also causes a burning sensation in the muscles for some time. Itching and swelling of the arm is common after taking these vaccines. Most side effects of the vaccine last for 2-3 days, but if you experience excessive inflammation, your arm pain and swelling can last for more than 5 days. this si...