hiee today I noticed a lump at the backside of ear of my son who is 18 months old..there was lump on bone previously there was no such lump..is it dangerous or normal

A. In this here it is very difficult to comment properly until a proper examination or assessment is done to find out the exact caufhse so it is advisable to consult your doctor so that he could examine and evaluate properly and will guide you accordinglyg for this .