The Centers for Disease Control and Prevention (CDC) offers this information on “What to Expect after Getting a Covid-19 Vaccine,” on its website, CDC.gov/coronavirus.
Common side effects are: On the arm — pain, swelling; throughout the body — fever, chills, tiredness, headache.
These side effects may affect the person’s ability to do daily activities, but they should go away in a few days.
If you have pain or discomfort, talk to a doctor about taking over-the-counter medicine, such as ibuprofen or acetaminophen.
To reduce pain or discomfort in the arm, apply a clean, cool, wet washcloth over the area, and use or exercise the arm. To reduce discomfort from a fever, drink plenty of fluids and dress lightly.
Contact your doctor or health care provider if the redness or tenderness increases after 24 hours, or if the side effects are worrisome or do not seem to be going away after a few days.
If you think you might be having a severe allergic reaction after leaving the vaccination site, seek immediate medical care by calling 911.
For information about the second Covid-19 shot, visit CDC.gov/coronavirus.