Post-Vaccination Care: Measles, Mumps, and Rubella (MMR) Vaccine

Child receiving MMR vaccine and post-care guidance

Common Side Effects After Vaccination

Unlike some other vaccines, side effects for the MMR vaccine can often appear 1–2 weeks after the injection. This is a normal part of the immune response.

High Fever: Occurs in 5–15% of cases, typically 7–12 days after vaccination. The fever usually lasts 1–2 days. Use a damp cloth to wipe the neck and joints to lower body temperature. If the fever persists, administer fever-reducing medication as recommended by your physician.
Joint Pain and Local Reaction: Some children may experience swelling or redness at the injection site. If the child is in pain or very fussy, apply a cold compress to the area. These symptoms generally resolve on their own within 1–2 weeks.
Vaccine-Related Rash: Occurs in approximately 5% of cases, starting 7–10 days after vaccination. The rash will appear and fade naturally without the need for topical creams.
Note: If a rash persists for an unusually long time, it may not be related to the vaccine. Please consult a pediatrician for an evaluation.

When to Seek Immediate Medical Attention

Serious allergic reactions are extremely rare. However, seek medical help immediately if your child experiences any of the following:

Severe Allergic Reaction (Anaphylaxis): Such as hives, difficulty breathing, or swelling of the face, lips, or eyes.
High Fever: A very high temperature that does not respond to medication.
Prolonged Local Pain: Severe pain or swelling at the injection site lasting more than 2–3 days.
Extensive Rash: A red rash that leads to skin peeling or covers the entire body.