Is there any medicine
For white patching on skin its improve your white skin appearances but not cure it.
The is good cure rate for vitiligo in homoeopathy in V1and V2 stages but difficult to treat V3 stage. Ammi visnaga and babchi oil for external application along with constitutional medicine internally. However it requires 1 to 2 years to achieve recovery. Sometimes deworming helps in most of the cases. Basically it is the sort of autoimmune disease.