#asktheexperts hi Dr. my son is 2 months old and we are done with his 6 week vaccination on 11 july but today I am seeing his left thigh lump being red than usual . what should I do

A. Hey there! Firm lump at a baby’s injection site is a common, harmless reaction that can last for weeks or months, but increased redness, warm, or tenderness requires an evaluation by the paediatrician to rule out a secondary infection.