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Dr. Andrew Rynne

Family Physician

Exp 50 years

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What causes swelling on left arm after BCG vaccine?

Answered by
Dr. Arun

Pediatrician, Pulmonology

Practicing since :2003

Answered : 1837 Questions

Posted on Sat, 16 Aug 2014 in Child Health
Question: I have just noticed that there is a lump in my 6 months baby's armpit (left arm). It was not there few days back(15-20 days back). Photo for the same is attached for your reference. Please look into this and let me know what kind of lump is this and what is the treatment?
Answered by Dr. Arun 47 minutes later
Brief Answer:
could be lymph node swelling or abscess

Detailed Answer:
Thanks for writing to health care magic.
After seeing the picture and reading your history that there was a big swelling on left arm after bcg vaccine, the possibility I think is
1. BCG adenitis . Bcg vaccine can cause reactive lymph node swelling which usually happens in the axillary area , like in your child.
Usually if the size is less than 1.5 cm nothing needs to be done, it may settle spontaneously.
But in your child, the size is large and swelling of this size needs surgical aspiration or excision along with 6 months of isoniazid medication once daily.Discuss with your pediatrician about this.
Don't worry, it will settle with this procedure I mentioned .
Wishing him speedy recovery
Dr Arun
Above answer was peer-reviewed by : Dr. Bhagyalaxmi Nalaparaju
Follow up: Dr. Arun 7 hours later
Can you please let me know isoniazid medication (medicine name) which we can use for this?
Answered by Dr. Arun 7 minutes later
Brief Answer:

Detailed Answer:
For babies you can use ipcazide syrup .
Or any brand of isoniazid tablet like inatos, etc
But this will need prescription for which you need to meet your doctor.

Above answer was peer-reviewed by : Dr. Vaishalee Punj

The User accepted the expert's answer

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Recent questions on  Bcg adenitis

doctor1 MD

Hi I am a chest physician and sorroly I have to deal with peditric age group. A 6 months age child had BCG at age of 40 ds and had axillary LN enlarged and got tttt fot that by INH + Rif for a while and the stopped on no base. Now has some nodular lesion beside the site of vaccine and no definite systemic symptom, I am asking what to do with that lesion?