If it is truly boil and not rashes, she need to be place on oral antibiotics, ampiclox is okay provided you can adhere to the dosing 6hrly for 5days (I.e 4 times a day) or amoxiclav which is just twice daily and also apply penicillin ointment instead of the biocin. You also need boost her immunity (consult a pharmacist for good recommendation). Also incorporate lot of fruit and veg and water intake