Hi, doctor I have a problem with my mouth, 4 months earlier it began as if it was eroded, then after one week the smell went bad I went to see a doctor, he prescribed me medicine called erythromycin, when I took it I felt better but when I finished the dose, the smell came back,I have tried to take every advice do anything am told to do but now I am frustrated cause even when I brush the smell comes back it feels like my mouth is rotting away please help me.