Redness and swelling after vaccination belong to the normal vaccine reaction phenomenon, you can observe the main, appropriate use of hot towels for warm compresses, improve the local microcirculation.
After vaccination, some people will have local reactions, such as redness, swelling and slight pain around the vaccination site, which can subside in about 3 days. It is important to note that during this period, the skin should not be scratched because of itching, otherwise local bacterial infection may be caused by skin breakdown.
If you find that the local redness and swelling of the skin area to expand or the pain increases, it may represent the emergence of secondary bacterial infections, you should immediately go to the hospital for examination and treatment, usually, the doctor will take oral or intravenous antibiotic drip to anti-inflammatory treatment.