How many lymph nodes can you feel in back of 2 yo head? i feel clusters at base of neck. not swollen but 4-5. 1 is tiny like sand but mobile. normal?

Likely normal: We have many lymph nodes in our neck. They are more noticeable (easly palpable) in thin patients and in patients who have an active infection or inflammation. If they are small (pea-sized) and mobile, they are likely normal. If it persists, becomes tender, or enlarges, see you pediatrician. Also if it seems the l ymph nodes are merging into 1 mass, see your pediatrician.

Monitoring Centers: Lymphatic system absorbs/carries things too big to go into the arteries/veins like bacteria eaten by white cells and digested food. Lymph nodes "taste" the lymph for anything bad 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.