IKEA miloon children bed is not longer have to change the bed and mattress
It should be based on your physical condition and the state of the mattress itself.
Generally speaking, the following points are the factors to be considered: 1, mattress sag is very bad, or the degree of hardness and hardness varies greatly in different places. Obviously, in this case, the spring of the mattress has been partially damaged and should be replaced or repaired in a timely manner.