please get a check up with e n t surgeon .
your daughter most likely to have infection in one of the sinuses
with purulent offensive discharge .
this is not sue to indigestion
the rashes most probably are due to allergy
to some thing .
please find out any thing that is being used on your baby or ant eatables etc cause aggravation of the rashes .
please consult physician and get examined
hope your baby will soon be all right soon with proper treatment