You should usually change your sheets about once a week, and at least every one to two weeks in normal circumstances.

Basic rule of thumb

  • Most hygiene and sleep experts recommend washing or changing bed sheets weekly to remove sweat, skin cells, dust mites, and allergens.
  • Stretching to every two weeks is generally considered the upper limit for people who shower before bed, don’t sweat much, and don’t sleep with pets.

When to change more often

Change sheets more frequently (every few days to weekly) if you:

  • Have allergies, asthma, eczema, acne, or sensitive skin, since dust mites and allergens build up quickly.
  • Sweat a lot at night, live in a hot/humid climate, or sleep in minimal clothing.
  • Let pets sleep on the bed or eat in bed, which adds hair, dander, bacteria, and crumbs.
  • Someone in the bed has been sick (cold, flu, stomach bug): change right after symptoms improve.

When every 2 weeks can be OK

Every 10–14 days can be acceptable if you:

  • Shower before bed and wear full pajamas.
  • Do not sweat much, don’t have allergies, and do not share the bed with pets or eat in bed.

Other bedding timing

  • Pillowcases: at least once a week (more often if you have acne or oily skin).
  • Duvet covers/top covers: about every 1–3 months, or more often if pets are on the bed.
  • Pillows and comforter inserts: roughly every 3–6 months, following care labels.

Quick summary

  • Ideal: change sheets once a week.
  • Acceptable maximum for many people: every two weeks if you’re very clean and low‑risk.
  • Go more often if you sweat, have allergies/skin issues, sleep with pets, or someone is sick.

Information gathered from public forums or data available on the internet and portrayed here.