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How to Fix a Hump in Your Mattress

You've been dealing with dreaded "King's Ridge" - maybe it's not time to replace your mattress just yet.

If you have ever purchased a king mattress in the past 5-10 years you have probably experienced seeing or feeling a hump form in the middle of the mattress.

Why does this happen?

Couples spend less time cuddling in the middle of a mattress and more time sleeping on their respective sides.

But, what if my old mattress never had a hump?

Newer mattresses have much more padding than older mattresses and have more conforming innerspring or foam support systems. Much like the foams in a couch, the foams in a mattress soften after they have been broken in. The spots you spend the most time soften up and the middle doesn’t, it remains not broken in.

So, how do I fix the hump?

Sleep on it!:) No, don’t try to sleep in the middle – we cannot control what we do when we are sleeping, we will likely roll back to our “spot”. A king mattress is 76″x80″ – not a perfect square, but close enough that you can rotate your mattress a quarter turn and basically sleep across the mattress without literally sleeping across the mattress.

The best suggestion is to do this within the first couple months of owning a new mattress. Rotating a quarter turn every two weeks for the first two months will ensure the most even break-in of the new mattress. If you have had your mattress for sometime, realize that it may feel uncomfortable for the first few nights up to a full week or more until the foams in the middle of the mattress soften up. You should start to see the ridge go away after two weeks. Repeat this process any time you see a ridge develop.


Springfield Mattress is an independent mattress retailer founded in 1957 that specializes in handcrafted mattresses, adjustable beds, luxury pillows and sheets.

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