Body impressions are common, particularly in old mattresses and softer mattresses with more plushness. However, a mattress with noticeable dipping and sagging after just one month is an issue. No matter the quality of your new mattress, be it one of our top picks in this year’s best mattress guide or any other, sagging can be a problem — particularly if you don’t get a mattress suited to your sleep style and body weight.

Sure, you can expect your mattress to age with time – lumps, bumps and sagging are among the things that happen to your mattress after 10 years - but within one month? We’d expect a refund too. That said, there are valid reasons why your new mattress is sagging. Here, we're looking deeper into these reasons and offering our best advice to fix it, plus how to prevent it in the future.

Why is a sagging mattress a problem? In short, sagging mattresses are unsupportive mattresses. They can make it difficult to find a comfortable sleeping position which can disturb your sleep. Nobody wants to toss and turn on a bumpy mattress when they should be enjoying quality sleep.

At worst, sagging mattresses can cause uneven spinal alignment leading to back pain and body aches over time. Why your new mattress is sagging after one month Your mattress is molding to your body Mattresses are primarily based on a support unit which is then topped with comfort layers. These comfort fibers will start to compress into the position of your body once you’ve slept on the be.