Most common cause of postauricular lymphadenopathy in children :

Posterior or Suboccipital cervical lymphadenopathy is caused by Roseola, Rubella, Scalp infections. The lymphatic drainage of posterior scalp is to the occipital region. Posterior or Suboccipital cervical lymphadenopathy without obvious disease or secondary infection is characteristic of lice. Secondary pyodenna due to scratching may result in matting together of the hair and cervical and occipital lymphadenopathy.