Hi and thanks for the query,
From what you describe, the fact that they do not itch make the possibility of an allergic reaction
a bit rare.
However this spread might suggest a fungal infection
that is actually spreading. A clinical evaluation by a dermatologist
might be of great help. Physical examination gives a clear diagnosis and clues for appropriate treatment.
I suggest you take an appointment with your dermatologist. You might visit the emergency room as you wait to see the dermatologist.
Thanks and best regards,