How To Treat Impetigo?

Hi doctor, in the beginning i had a dry patch behind my lower leg, as i am prone to having very dry patches of skin around my legs and arms. However after having the dry patch behind my lower leg I began to scratch it while i would sleep, however it started leaking fluid and spread to my arms where i had the dry patches but the patches on my arm would form yellow crusts. So i went to my doctor and prescribed me with flucloxacillin antibiotics for a week and diagnosed me with skin infection. However, after one week the rashes did not go away and the doctor diagnosed me with impetigo and gave me flucloxacillin for two weeks. I only finished my given course of two weeks yesterday but it has not had any effect but rather spread the infection as it has formed tiny rashes around the wound where i have scratched it as it gets very itchy. I have been suffering with this for more than two months now and really want to get rid of it and would not want to be given another useless medicine. I also did a blood test and it came out healthy.