Hi docmy mum have a chronic kidney desceaseshe’s taking up

Patient: Hi doc…my mum have a chronic kidney descease..she’s taking up lots of medicine..then one day she woke up with rashes and it really itchy..sooner it became worse..the doctor said she has a gingivitis colitis..allergy in one particular medicine that’s she take..she’s taking antihistamine now and corticosteroid cream…how long will her skin back to normal?