How long will a scalp fungal infection heal if taking terbinafine 250mg.?

Well my mum and i have beeen on them now for 6 and a half years, and only now its almost gone, but everybody is different, i suppose it depends on how deep and severe the infection is,but dont scratch it or this will delay the healing, as i used to but since i stopped its almost gone! we to are on the same drug and dosage as you, its all about patience! my doctor did tell me it takes a long time.