Thanks for writing to us.
I can understand how cumbersome and depressing it could be to have a chronic persistent skin condition. I would be able to help you out, if you could send us a detailed clinical history and also tell us what medication has she taken so far. Your mother might be having some eczema
or fungal infection
but as you have not given any details about the same, it is difficult to think of the most probable cause.
You may use Ask a specialist feature of this website for Korea reason aliased advise.