There is no single rule for how often bedding should be washed — the right frequency depends on how much you sweat, whether pets share your bed, and whether anyone in your home has been ill. For most people, a weekly routine covers the basics, but some circumstances call for more frequent changes. Here is what to know for each type of bedding.
Sheets and pillowcases: once a week for most people
Every night, bedding quietly accumulates body oils, sweat, moisture, dead skin cells, and hair. This is entirely normal — as American Voices notes, “None of this means that your bed is automatically unhealthy or dirty.” It is simply the result of using the same fabric night after night.

