he is 18 months old he has little lumps back side of head, on left side of neck n on above the chest n he is not feel any pain when I press them what are the reasons responsible for this

A. it is very difficult to comment here without a proper examination so it is better to consult your doctor and get it properly physical examine and guidance accordingly for this matter to clear this...in this query you can contact with the doctor and the doctor will guide yout regarding this matter properly after a proper guidance you can follow the advice given which is imp and you follow advise