You seem to have developed an allergic reaction
to the face wash.
You need to discontinue using it.
Use a mild topical steroid
over the affected area twice a day.
Take some oral antihistamines to decrease the itching and the allergy.
Do not use the same product again.
See a dermatologist
for treatment of skin pigmentation after the allergy subsides.
Hope it helps
Dr Geetika Paul
MD ( Dermatology)