Medically reviewed by Renee Nilan, MDMedically reviewed by Renee Nilan, MD COVID arm rash is a delayed hypersensitivity reaction that occurs approximately five days after the COVID-19 vaccine.

The rash and the itching might be due to an allergic reaction, and so waxing might be the culprit, but it's more likely that your anti-perspirant is to blame. Try switching from an aerosol to an ...