How do you apply the selsun blue to the versicolor?

Slap it right on: Directions as per above. Good thinking with the selenium!

I actually tell my: patients to apply it neck down in the shower and leave on for 20 minutes then wash off. They should do that daily for two weeks then the scale should be gone and they can expose their skin to sunlight ( 10 minutes only a day and no burning) which will repigment the skin. If that doesn't work they need topical or oral prescriptions to clear the fungal infection