Hello. Thank you for writing to us
I would have liked more information from you regarding any associated symptoms, if any.
It is not usual for a usual pus filled bump to persist for 1 month without any change.
I would definitely consider the possibility suggested by your
pediatrician i.e
molluscum contagiosum.
Molluscum is a viral infection.
It characterized by pearly white, dome shaped, asymptomatic lesions which can persist for weeks or even months.
The infection is common in children and is acquired from fomites like sharing towels etc.
The cream that you have been using is a
topical steroid and would not help in this condition; rather it would encourage the infection and should be stopped.
I suggest that you visit a
dermatologist for a confirmatory diagnosis.
Treatment for a molluscum lesion is simple i.e extraction of molluscum body by de-roofing with the help of a needle.
Regards