Hi,
If your living climate has recently changed to cold and dry, it is mostly due to the dryness. Do not use soap nor scratch the area. Moisturizing creams like aloevera gel may be useful. Also since the scaling is spreading, it may be due to an infection, you need to consult a dermatologist.
Solace
yes see a dermatologist. dont scratch it, it can prolong the issue. it sounds like an allergic reaction or an infection.
Maybe a dermatologist can help.