Hello sir and welcome.
As for the itching, this could be an infection and any treatment prescribed without thorough investigation would be considered blind treatment and in most cases would be ineffective. So please visit your doctor and go about a physical examination, urine analysis and swab test if required.
As for the size of her breasts, this can be reduced by encouraging weight loss
and/or breast reduction surgery
, please consult a doctor for the same.
Hope this helps.