My son received his four month shots six days ago, today I...

Question: 

My son received his four month shots six days ago, today I noticed a hard lump/mass under the skin, near the injection site. Is this normal?

Answer: 

Common vaccine reactions (such as soreness, redness, and swelling in the leg where the vaccine was given) may make your child uncomfortable, but these are not harmful. They will generally subside in a day or two. We recommend that you call your local community health centre and ask to speak to a Public Health Nurse who will be able to do a further assessment. You can find the number here.

Immunization Nurse