My 1 year old has an inguinal lymph node in her right leg her pediatritian said is nothing to worry about and is common in nfants, should i be worried?

Common : Most infants will have lymph glands in either inguinal fold that measure about the size of a peanut. They are normal findings.On occasion they may double their size during a simple viral illness, after some vaccines or when a skin disturbance is located nearby.

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.