Dear parent,
Thank you for your query at DoctorSpring.com

I can understand your concerns. The problem of swollen lymph nodes in the neck region is a very common and distressing predicament.
Lymph nodes act as sentinels. They guard certain regions. For example, the neck lymph nodes drain all of head and neck. So any infection in the throat, tonsils or ears can cause lymphadenopathy. This is called reactive lymphadenitis and is the most common cause of gland enlargement in children.
Presence of matting needs to be confirmed by a paediatrician. Usually, lymph nodes become matted in conditions such as tuberculosis and lymphoma. It is unlikely that these lymph nodes would remain asymptomatic for around 9 months. Usually, they would be accompanied by fever, loss of appetite, loss of weight or night sweats. Hence, of the two diagnoses, tubercular lymphadenitis still needs to be ruled out.
I request you to go to a paediatrician in person as soon as possible.
Wishing your child a speedy recovery.
Regards
Dr. Saptharishi L G