From the description it seems your mother is suffering from some kind of hand eczema
. Sometimes topical steroids
alone do not help in treating the condition. A course of oral steroid needs to be given. dr the same please consult a qualified dermatologist
In the meanwhile, please ask her to use a mix of potent steroid and antibiotic cream twice in a day. she should use mild colloidal oatmeal based cleansing lotions to wash hands and moisturise hands multiple times in a day. If the lesion itch and are painful, she should take tablet cetirizine
. she should avoid all daily chores esp washing clothes, use of any detergent or chopping vegetables or fruits.
Hope that helped.