For almost six months i have had both anterior and posterior cervical lymph node enlargement. all are about 1.0 cm or less. should i be concerned?

What else?: Have you had any other symptoms? What preceded the onset of these nodes. Suggest you have a doctor examine you, but suspect these are benign.

Probably not: Reactive lymph nodes are very common. We start to get excited about them when they're over 1 1/2 to 2 cm in size. In the absence of any other significant symptoms these lymph nodes are probably nothing to worry about. If they do concern you, however, it is a good idea to discuss the matter with your primary care doctor.

Monitoring Centers: Lymphatic system absorbs/carries things too big to go into the arteries/veins like bacteria eaten by white cells/digested food. Lymph nodes "taste" the lymph everywhere for bad stuff like bacteria/viruses/cancers, etc. When it detects a problem, it alerts the immune system and your body reacts. They enlarge in response to the inflammation they create when they react. They shrink when all is well.