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Post-vaccine lump on 3.5 month old baby
My 3.5-month-old baby received her 15-week vaccination on 8th May. Around 2-3 days later, I noticed a hard lump at the injection site on one thigh. The lump is bigger than a pea in size. There is no redness, swelling, warmth, discharge, or pain when I touch it, and my baby does not seem uncomfortable when the area is touched. She is otherwise active and feeding normally.
She has received all previous vaccinations on schedule, but this type of lump never appeared earlier after any vaccine. I want to understand whether this is a normal reaction after vaccination or if it needs medical evaluation. How long do such post-vaccine lumps usually take to disappear? Are there any warning signs I should watch for that may indicate infection or another problem?
Answers (5)
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Dr Faisal Zoheb
MBBS , MD PAEDIATRICS , PGPN (BOSTON), FELLOWSHIP IN NEONATOLOGY ( Newborn and vaccination specialist )
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Dr. Bhatt Vivek Prafulchandra
Pediatrician
5 yrs exp
Rajkot
Consult with Pediatrician physically for further evaluation and treatment
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Dr. Venkatesh Badugu
Pediatrician
9 yrs exp
Hyderabad
Post vaccination lump quite common in infants.
Usually no need of treatment as the swelling will come down usually by a week
So Nothing to worry
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Dr. Kondabolu Vamsi
Pediatrician
1 yrs exp
Vijayawada
For this no treatment needed if the baby had no fever or any symptoms as such no need to worry the lump regress over time
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Dr Jay Gajjar
Pediatrician
6 yrs exp
Surat
Such lumps may take a few weeks and sometimes even 1–2 months to gradually soften and disappear.
No specific treatment is usually needed. Avoid pressing or massaging the area. You may observe for now.
Please seek medical evaluation if you notice:
• Increasing redness, warmth, or swelling
• Pus/discharge
• Fever or excessive irritability
• Significant pain on touch
• Rapid increase in size
• Reduced leg movement
At present, based on your description, it appears to be a benign post-vaccine reaction.
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Disclaimer : The content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding your medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.