How Long Can Bed Bugs Survive Without Feeding?

When people find bed bugs, one tempting idea is to leave the room or the home empty and let them starve. Unfortunately, bed bugs are remarkably good at waiting. Understanding how long they can survive explains why this approach rarely works.

This guide explains what is known.

The short answer

Bed bugs can survive for months without feeding, and in some conditions even longer, with adults generally able to live longer than young nymphs. Survival depends on temperature and humidity: cooler conditions slow their metabolism and extend survival, while warm conditions shorten it. Because of this, leaving a room empty is not a reliable way to get rid of bed bugs, and they may still be present when you return. Professional treatment is needed.

Factors that affect survival

• Temperature: Cooler conditions extend survival, warmer conditions shorten it.
• Life stage: Adults tend to survive longer without feeding than young nymphs.
• Humidity: Very dry or very humid conditions can affect them.
• Recent feeding: A recently fed bug has more reserves.

Why they can wait so long

• They slow their activity when hosts are absent.
• They hide in cracks, seams and furniture where conditions are stable.
• They can go into a resting state and wait for a host to return.

What this means in practice

1. Vacant homes: Bed bugs may still be there when you return after weeks or months.
2. Stored furniture: Infested items can carry live bugs for a long time.
3. Moving house: Bed bugs can survive in boxes and furniture during a move.
4. Sleeping elsewhere: Moving out temporarily will not remove them.

What does work

• Professional treatment with heat, steam or approved products.
• Follow-up visits to catch eggs that hatch later.
• Washing and heat-drying bedding and clothes.
• Mattress and pillow encasements.
• Reducing clutter and hiding places.

Be careful if you leave

If you move out temporarily, do not carry infested belongings to your new place. Wash and heat-dry clothes, and keep belongings sealed.

When to call a professional

Do not wait for bed bugs to starve. Book an inspection and treatment as soon as you find signs.

Frequently asked questions

Will bed bugs die if I leave the house for a month?

Probably not. They can survive for months without feeding.

Can I starve them by sleeping elsewhere?

It is unlikely to work and can spread them if you carry items.

Do cold rooms kill them?

Not reliably. Cooler temperatures can extend survival.

Do young bed bugs starve sooner?

Generally they cannot survive as long as adults, but they can still last a while.

This guide is part of IPest's complete resource on bed bug control. For identification help, prevention and treatment options, see our full bed bug treatment guide for Bangalore.