Since this problem is not controlled with her previous treatments, I will advise you to consult a dermatologist again and discuss about three treatments which can help her:
Long term steroid: a long term steroid like Prednisolone is indicated for her and will help her greatly.
Retinoids: systemic Retinoids can be given for this and will be curative
Immunosuppressants: Immunosuppressants like Tacrolimus and Pimecrolimus are the mainstay in intractable eczema These will help her more than immunosuppressants.
Light therapy: like Ultraviolet and Grenz Ray therapy.
Monoclonal antibody: injectable biologic (monoclonal antibody) called dupilumab (Dupixent), this is a new treatment which can help her.
These are the five therapies which her dermatologist can prescribe for her and which will help her greatly..
Meanwhile continue the normal steps of treatment for Eczema which her doctors will have already advised her:
Antihistaminic: Continue the antiallergics like Avil
Avoid sunlight: This is most important. Avoid going out into the sun as far as possible. If she has to go out, she should use a wide brimmed hat and long sleeved dresses and pants. Sunscreen is a must – use sunscreens with 50% SPF or more.
Steroid Ointments: Apply 1% hydrocortisone (OTC) twice daily on the areas for 1 month.
Emollients: Use an emollient, a hand cream twice daily. Combine the Emollient with the Hydrocortisone ointment or she can also alternate the two.
Avoiding the irritant: If some irritant can be identified, then it should be avoided.
Wet wraps: wrapping the affected area in steroid -water solutions help greatly, discuss this with a nurse.
These steps will help, but also discuss with a dermatologist about the treatments I suggested.