Welcome to HealthcareMagic forum,
Your dad is suffering from vitiligo
,which is an autoimmune condition ,kindly look out for other autoimmune conditions too in body like thyroid
ds.Its a chronic and slow responding condition.Various modality of treatment is available now a days....like topical therapy,phototherapy(latest being UVA & NBUVB)..surgery etc..Treatment depends upon whether ds is active(spreading) or stable(not spreading)...in active condition patient is given specific medicine to make it stable...there are phototherapy chambers available with dermatologist
where you can take treatment...kindly consult a good dermatologist for same.