Suggest Remedies For Pain In Back Due To Herpes

her age-54 years,weight-74 kg.hello doc.my mother is suffering from herpies at her half back & front portion,since 20days.doc suggested aciclovir & fucidin cream for application & she has also taken zovirex for 7 days.but the burning & pain sensation is too severe that she cant even sleep.how long will it take to cure?& how will she get rid of these pain & burning sensation?