It may be an allergic reaction to one of the ingredients in the vaccines. If he itches too much, you can apply Lidocaine ointment 5% or Hydrocortisone cream 1% (both OTC) to the redness site (erythema). If a vessel was broken during the vaccine, that redness (bruise) should change the color by now. Site infection with vaccination is extremely rare.
Answered 10/24/2021
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The injection site reaction is common. If the redness increases to more than two inches, please let your pediatrician know..A virtual consult with Healthtap is available. A cool compress and Tylenol doses for his weight is recommended after discussion with your physician.
Answered 10/25/2021
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