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Short term steroid
is unlikely to have caused any worsening lie this - could have been worse without it..
The treatment seems appropriate / May be she has an infection super-added.
A CT scan
may show underlying problems.
Blood counts may show eosinophilia
Blood tests to find the cause of allergy
and subsequent de-sensitisation may help
Parthenium weed, common in Bangalore, might be contributing.
Wishing speedy recovery