The most important effect is to suppress the progression of the disease so that vitiligo does not spread further.
In rapidly progressing vitiligo, it is necessary to first prevent new lesions from appearing or existing lesions from enlarging by modulating the immune response.
In oral steroid treatment, disease progression has been reported to be suppressed in approximately 80–90% of patients.
After the disease has stabilized, ultraviolet light therapy, excimer laser, or tacrolimus ointment can be combined to induce repigmentation.
In other words, oral steroids can be seen as a treatment that stabilizes active vitiligo so that subsequent repigmentation therapy can be effective, rather than a treatment that directly fills in pigment.
