It is not advisable to use cups or tampons when there is any kind of infection in vaginal area. Ask her to see a gynaecologist too and this needs attention. Ask her to use Paree sanitary pads. They are good and very comfortable. It just absorbs in 3 seconds keeping you dry throughout the day. The wide breathable back sheets and soft top sheet ensure there is no leakage and rashes tension.

Yes if infection is there better to use pads instead of tampons or cups. She can use the one from paree. I am using their prima range, it's xxl with wide back and wings, absorbs well and is economical in the premium quality range.

During infections its better to avoid cups. Better to go for Paree Prima rash free premium pads. They are cotton, soft and comfortable.