It seems that you developed irritant contact dermatitis
It may be due to keratin treatment.
You are having redness and exfoliation on forehead...that is ICD.
And you are having lesions on back part of left knee.
It may be Allergic dermatitis
or atopic dermatitis
I think you must be having atopic diathesis.
So, your skin is sensitive to develop irritations and allergy.
You consult nearby dermatologist
Oral antihistaminics and steroids
in tappering dose may be taken.
Local application of steroid cream will improve the lesions.
Avoidance of soap bath is needed.
You will be alright, do not worry.
But you should take care to find out allergens and to keep them away.
I hope you got my answer.
Dr. Ilyas Patel MD