The Moderna and Pfizer-BioNTech COVID-19 vaccine frequently cause injection site pain and swelling. They occasionally accompany less usual itching rashes and other signs and symptoms. That reaction is known as COVID Arm. Although it is uncommon and innocuous, it can be painful. It usually happens about a week after receiving the first or second immunization dose. The Moderna vaccine is primarily connected to the Covid Arm. https://businessupside.com/2022/11/23/covid-arm-facts-you-must-know-side-effects-remedies