We Value Your Privacy

We and our partners use technology such as cookies on our site to personalise content and ads, provide social media features, and analyse our traffic. Click below to consent to the use of this technology across the web. You can change your mind and change your consent choices at anytime by returning to this site.

Update Consent
Loading ...

How to flatten lumps in a memory foam mattress topper

Updated March 23, 2017

Originally developed by NASA in 1966, memory foam, or temper foam, is used in mattresses and mattress pads because of its unusual viscoelastic properties. It is soft, absorbs impact, warms with heat and conforms to the shape of the body providing support when sleeping. When pushed into shape, memory foam will retain that shape for a period of time; however, because of its open-cell construction, the foam will return to its original shape, allowing creases, lumps and bumps to disappear.

Loading ...
  1. Spread out the mattress cover on a flat surface, and allow it to stand for 48 to 72 hours. The memory foam, without any exterior pressure, will return to its factory-original shape.

  2. Apply light heat to the lump by laying on the area with your body and letting it absorb some of your body heat. Massage and shape out the lump when the foam is warm. Leave the mattress topper alone to return to its original shape by following Step 1.

  3. Flip the memory foam mattress pad over, and use it flipped for a few weeks, working out the lump periodically as the mattress pad warms to your body temperature.

  4. Warning

    Never apply direct heat from an iron or other device to the mattress topper; memory foam contains combustible components and may ignite.

Loading ...

Things You'll Need

  • Memory foam mattress cover

About the Author

A writer and professional lab assistant based in Seattle, Kate Bruscke has been writing professionally about health care and technology since 1998. Her freelance clients include "The Seattle Times," KGB.com, Reading Local: Seattle, Nordstrom and MSN/Microsoft. Bruscke holds a Master of Fine Arts from The School of the Art Institute of Chicago.

Loading ...