Enlarged lymph nodes on 12 yr old daughter that are spreading under her chin and by hairline and are tender to touch. had them for a month.?

See your MD: There are many thing that could cause this. You should take your daughter to see her pediatrician.

Get Seen: 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 s 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.