Ridge In The Middle Of A Mattress

We are often asked why mattresses develop a ridge or hump in the middle of them. People spend a lot of money on mattresses and often become very frustrated with an unsightly ridge that develops in the middle of their expensive mattresses. These high spots or ridges run from the head end of a mattress to the foot end mattress. We are repeatedly asked if this is considered normal wear and if such unsightly humps are covered under warranty. Whether you own a king or a queen these high spots located down the middle of a mattress are actually a fairly common occurrence.

How does the high spot develop?

It is very common for both queens and kings to have such strange wear. The majority of mattresses that get these humps have significant layers of padding. The ridge in the middle is the result of infrequent use for the reason that the middle of the mattress is rarely used. Most couples tend to nest comfortably on their respective sides of the bed. The constant and consistent usage of the same sleeping areas causes mattresses with multiple layers of polyurethane foams and other comfort padding layers to compress. These indentations are sometimes-called body impressions. The body impressions are actually low spots in the mattress where the sleeper lies night after night.

Is the hump in the middle of a mattress going to go away or am I just stuck with this unsightly ridge?

Most likely the hump will not go away. It is much more common that it may in fact begin to look worse as the mattress gets older. Many times unless excessive wear has taken place such ridges are not covered by the manufacturers warranty. Be sure to contact the retail store you purchased your mattress from or mattress manufacturer if you believe your mattress is defective.

Why didn’t my old mattress have this ridge in the middle?

This is primarily because mattresses in the past did not have all the padding that they do today. Not so many years ago mattresses were thin and not very padded and had their own set of frustrating issues. Back in the day it was not uncommon for coil springs to fail and poke you in the night and cut directly through thin layers of padding creating discomfort.  Even further back some had obnoxious buttons that were design to keep the few comfort layers the bed had into place.

Is there any way to fix the hump I have in the middle of my mattress?

There are some things you can do to help prevent uneven wear. Turning or rotating your mattress frequently can help even out mattress wear and give the padding a chance to rejuvenate and bounce back some. We recommend doing this even if your warranty says you do not have to rotate the bed. If you have a two-sided bed you can flip your mattress over to extend mattress life. Another helpful hint when your taking a nap try to make a conscious effort to use the middle of the bed, especially when your partner is not in bed with you. Finally our favorite suggestion is to move to the middle of the bed and snuggle with your bed buddy. It’s good for promoting even mattress wear and breaking down high spots in your mattress and more importantly it may very well spice up the relationship in the bedroom.


Doug Belleville and his father Dave own and run STLBeds - a specialty sleep store located in Arnold, MO. The staff at STLBeds is highly educated about sleep, comfort and their special sleep products. STLBeds only carries high quality mattresses and bed-related products. You won't find the brand names here - just call and ask us why!

19 Comments Leave your comment »

This has happened to us on an expensive Hypnos mattress. Nowhere in there care instructions does it mention this or any way to avoid it and we have never had it happen on any other mattress including others with deep layers of padding before. Frankly its poor engineering but you guessed it Hypnos are refusing to replace it.
Beware dont buy Hypnos.

Comment by Jeff Allen — April 8, 2011 @ 9:34 am

Jeff, sorry to hear about your issues with the Hypnos Bed. I don’t know much about them, however I do wander if Her Majesty Queen Elizabeth II would be refused if she had such an issue with with her Hypnos Bed. They seem to go on and on in their marketing about it being the most comfortable bed in the world. It would be interesting to see if she complained of a hump in the middle if she would get a new mattress?

Comment by Doug Belleville — April 10, 2011 @ 7:57 am

We purchased a very expensive bedset 6 years ago. The hump came shortly after a few months and has gotten worse since then. We have been rotating the mattress to no avail. Finally yesterday after watching our “camel hump” as I call it, get worse and worse we finally flipped our pillow top mattress over yesterday. I finally have a nice flat bed and I hope and pray the hump doesn’t return.

Comment by Sheila Marie — December 26, 2012 @ 11:01 am

If has two sides that are identical quite honestly it should be flipped over regularly. A minimum of 4 times a year even monthly if you want to get the most out of it. If it is a one sided mattress it should not be used that way. Contact your dealer or manufacturer and get the issue resolved or see what your options are. Hope this gets you in the right direction.

Comment by Douglas Belleville — December 27, 2012 @ 4:59 pm

I am astonished that a manufacturer such as Hypnos will not accept that a hump in the centre of the bed is unsuitable for purpose. Having found this problem with a Hypnos king size mattress recently bought, I intend to pursue a claim against the supplier as the discomfort is not tolerable.

Comment by Lyn Bates — September 14, 2013 @ 6:15 am

It seems a shame to have to flip over a pillow top mattress because then the “pillow” will be on the bottom, which defeats the purpose of having a pillow top. This would be a waste of good money paid extra for that feature.

Comment by Doug E — October 29, 2013 @ 5:13 am

Doug, There is a way you can flip a pillow top mattress over. It must have another pillow top on the bottom side of the mattress. This is possible if consumers opt to seek out retailers and manufacturers who continue to make two sided flippable mattresses instead of the non flippable 1 sided pillow top mattress. We are just one of many companies that still sell them. Two Sided Pillow Top Mattresses can be found here By the way great name! ;-) Thanks Doug

Comment by Douglas Belleville — October 29, 2013 @ 7:51 am

Ours only has a pillow top on one side so flipping it over is not an option. We won’t be buying a new one in the near future.

Comment by Doug E — October 29, 2013 @ 9:21 pm

I have a temperpedic mattress that has a hump in the middle, is there a way to resolve this problem.

Comment by Kathy — January 8, 2014 @ 10:43 am

I have had several king sets. There is a hard ridge in the middle. It is where the box springs meet. This ridge is rigid and does not give when laid on. This causes you to sleep on the sides of the ridge and will eventually create dips on either side. Even turning and flipping cannot get rid of the ridge that is just inherent to the set up. If you notice, smaller bed sets do not have this ridge since they have only one box spring. It has nothing to do with the padding itself but the inability to sleep on other areas.

Comment by billie — March 5, 2014 @ 9:00 am

Billie, Thank you I stand corrected. There is a lot of truth to what you say especially in older mattress and boxspring designs. I should have been more specific. Today that theory really does not apply to the majority of the boxsprings being made. This is because most are “not” flexible. The proper terminology is foundation or non-flexible boxsprings. These ridged designs have the same firmness across the entire foundation surface and offer sleepers a more consistent feel that solves the older issue you bring up.
In reference to your suggestion that the ridge has nothing to do with the padding I would strongly disagree and would encourage you to read prominent mattress forums Sleep Like The Dead, What’s The Best Mattress, or The Mattress Underground even Consumer Reports.
These days it is rare for couples to purchase full size beds so no we do not see ridges in this size; however it is very common in queen size beds and is a major industry problem since most couple opt for queen size and of course king and its issues have already been addressed. The problems are considered to be a result of thick mattresses using layer after layer of cheap foam and padding. Thank you for your input. Doug

Comment by Douglas Belleville — March 12, 2014 @ 8:00 am

We have been plagued by the hump in the middle of the last 3 queen mattresses we’ve purchased. Every time we are about to purchase a new mattress and we bring up the “hump” problem with the mattress salespeople we are assured that we will not have this problem with the manufacturer/s they represent. To date they have all been wrong. We have purchased successively more expensive mattresses each time thinking that more expensive means higher quality but that theory has been wrong too. Most mattresses seem to last about 90 days before they start to develop the hump.

We are about to purchase a king sized bed and are considering buying 2 xl twin mattresses placed on top of a king box spring to avoid having to deal with the hump in the middle. I’m wondering if there is any reason not to try this configuration. Unless of course you can recommend a mattress that will not develop the hump.

Comment by SusanT — March 24, 2014 @ 1:56 pm

Good afternoon all –

The “Hump” is planned, calibrated, tested and verified long before any mattress hits the showroom floor. It is classic “Planned Obsolescence” that forces a product to “fail” without being covered by the very carefully worded “Warranty”. The low spots get deeper and deeper until frustration leads to costly replacement, and and “Up Sold” by the list of “Pie Crust Promises” (easily made and easily broken) by the quota-chasing sales staff hawking the latest “technology”.

Of course materials are available that would stand up for a lifetime of use – humans sleeping is not a harsh, abusive environment that science cannot meet with lasting materials. It is simply marketing ploys at work – flowery prose and beautiful six color brochures – resplendent and adjective-laden promising the world. And delivering greatly over priced mediocrity at best backed by a warranty that says much and covers nothing that consumers actually encounter. This is why, if collected at all, “testimonials” are gathered very early on in the product life cycle; those who just spent a small fortune to replace something “old’ or “bad” are naturally wanting to feel they “did well”. A positive testimonial is simple bravado shouting “I won! I beat the odds! All the adjectives were right!!” In a year, the hump will return and start driving the once thrilled consumer back to the market to once again bet (and lose) another very large sum.

The cycle will not end so long as good checks walk in and bad merchandise walks out.

Luck to us all, and buyer beware.

Comment by Flying Scotsman — April 17, 2014 @ 12:56 pm

I had this problem and bought a new king mattress just a month ago and its getting a hump in the middle. We have figured it out finally. The problem with ours is the bed FRAME. It has a metal rod that runs down the length of the bed right where the hump is which makes in un-giveable. The solution was to go with just the rails and use four wood slates. Hope this might help someone else.

Comment by Tammy — April 24, 2014 @ 8:33 pm

What about a sleep number bed?

Comment by Gayle Stanton — May 4, 2014 @ 8:30 am

Gayle, Why sure they add lots of padding to the top of their zippered surface cover as well making it susceptible to impressions where we lay and would stand tall and uncompressed where we do not. The have a middle issue not dealt with in this conversation that adds another whole possibility for a weird feel in the middle, the divider between the two mattresses. Many people have complained to me of feeling this. Thanks for commenting Doug

Comment by Douglas Belleville — May 12, 2014 @ 7:51 pm

Having good support under the mattress, whether with an almost solid bed frame (lots of wood cross beams/slats and many legs on the floor) and/or a good box spring set, does NOT make any difference on the formation of that devil-inspired HUMP in the middle of the bed…and those killer grooves where each body lies. We’ve had expensive and somewhat cheaper mattresses over the past 12 years; innerspring (w/ memory foam as it is impossible to find mattresses without this nasty stuff) and solid memory foam beds…nothing solves these problems. The REAL problem is the manufacturer’s love of using that nasty memory foam. My old latex-only bed was great as is the queen Spring Air innerspring, 21 years old, in my guest bedroom. No humps or grooves. We just purchased a nice mostly-innerspring mattress set this past February (7 months ago) and the mattress has developed nasty grooves (the industry prefers to refer to these grooves as body impressions) along with that dreaded hump in the center; these defects showed up within four months of our sleeping on this new mattress. What to do…the manufacturers won’t warranty their cheaply built mattresses (no matter how much you pay for them) and we, the consumers are stuck with these monstrosities, as well as with our aching backs and sciatica! I’m tired of buying a new mattress every 2-3 years…it is killing my “budget” but, as one reviewer noted, the manufacturers are doing well!!

Comment by nvr2amzd — September 27, 2014 @ 8:49 pm

i have a sleep number king size dual control and has a ridge down the entire from top to bottom. what can be done to correct this issue ?

Comment by warren rogers — February 2, 2015 @ 6:50 pm

Warren, I am sorry to say not much now, prevention was the best way to keep it from happening. Option 1. Start using the middle of the bed so it wears even with the rest of the mattress. 2. Your bed is a modular type bed meaning parts and pieces can be replaced. If just the top is available consider just replacing the top. 3. Check to see if it is covered under warranty. 4. Get rid of it. Doug

Comment by Douglas Belleville — February 6, 2015 @ 7:41 am

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