But experts say there isn’t a one-size-fits-all answer to how often you should wash your hair — or what you can do to maintain it on off days. When to washRossi generally tells his patients they should wash their hair once or twice per week. But if you’ve had chemical treatments that can make your hair drier — such as bleach, perms or relaxers — you might want to wash it less than once weekly to avoid breaking or brittle hair or split ends, he said. But you should wash it at least every two to three weeks to keep your scalp and hair clean and healthy. If you’re experiencing perpetual issues with your scalp or hair — such as dandruff, hair loss or brittle hair — you should see a board-certified dermatologist who treats conditions in these areas, Rossi said.

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Persons: ”, Anthony Rossi, ” Rossi, Rossi, you’ve Organizations: CNN, Memorial Sloan Kettering Cancer Center, American Academy of Dermatology Association, American Academy of Dermatology Locations: New York City