Baby Has Nodule On Neck, Taken Vaaccination. Am Scared.
Thanks for posting your query.
Considering the information you have provided, the most likely possibility seems to be a lymph node swelling in response to the vaccine received by your baby.
A detailed physical examination by a paediatrician will confirm the diagnosis and rule out other less likely possibilities like cyst, abscess or malformation.
Lymph nodes are normal structures in our body which function as immunity boosting units and help us to fight bacteria, viruses or organism or any foreign body.
They increase in size whenever our body starts an immune response against an organism (which may enter due to a natural infection or a vaccination). They usually resolve on their own and do not require any specific treatment unless complications develop. If it is due to infection, it might worsen causing pain, redness, swelling, tenderness, fever, in which case antibiotics might be required.
So at present, your child seems to have a normal response to vaccination and doesn't require any further treatment but it would be best to confirm the diagnosis by his paediatrician to be absolutely sure.
Regards