What are the signs of cervical lymphadenitis?

Swelling & tendernes. Lymph nodes in the neck, when exposed to infection by viruses and bacteria will become reactive due to filtering thes organisms out into the lymp tissue. Chemicals are release which may cause swelling as well as overgrowth of the virus or bacteria inside the node. The nods can be under the chin, on the front of the neck and in the back of the neck (referring to the cervical spine) seek advice?
Enlargement and pain. The multiple lymph nodes throughout the neck respond to area infection or inflammation by enlarging and with that become tender.