Question: do you have to wash your hair everyday if you have dandruff?
Answer: You should wash your hair more often. Kaplan, M.D. To rid your scalp of dandruff, you need to clean out all the gunk, which a regular shampoo won't do. Dr. Kaplan recommends a medicated dandruff shampoo (which you can find at drugstores) every day, one that contains ketoconazole, selenium sulfide, or zinc.