It is usually not normal to have pain in the arm for six months after vaccination, and it is recommended to go to the hospital in time to check whether there is any infection, nerve damage and so on.
Usually, the body may have some adverse reactions after vaccination, in which the pain at the vaccination site is a very common local adverse reaction. Usually, the pain at the vaccination site will subside or disappear in 3-7 days, and usually does not last up to half a year.
When the arm pain after vaccination lasts up to half a year, it is not excluded that the vaccination site is infected, subcutaneous tissue damage, nerve damage and so on. It is recommended to go to the hospital in time for a detailed examination of the pain site to determine the specific causes of pain, and under the guidance of the doctor for treatment to avoid delaying the condition.