Welcome to HCM.
Thanks for writing in.
Flushing over face can be rosacea contact dermatitis
The thigh lesion can be tinea corporis
,contact dermatitis,GA etc.
A skin biopsy
and proper examination will be required for diagnosis.
You can continue oral corticosteroids
as the thigh lesion is not related to prednisone therapy.
Hope this helps.
Wishing you good health.