Hi, thanks for writing to HCM and sharing your son s health concerns! Yes, you are correct; this neck lump is nothing but an enlarged lymph node due to recent inflammation in the surrounding area! This is normal reactive/preventive action of our body s immunity system towards any infection, agents or insult...! Therefore, this one does not need any treatment as this is expected to disappear within 6-10 weeks but should be monitored! I would further suggest you, if still not convinced, to go for an FNAC /biopsy and ultrasound of the lump for confirmation and to relieve your concerns! Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions. Wishing your son good health.