When purchasing a spring mattress, choose a reputable manufacturer; do not solely focus on the appearance and price of the mattress.

2. When purchasing a mattress, it's crucial to lie down and flip left and right a few times. Good mattresses should not have shifting fillings or uneven surfaces. Additionally, lying flat on the bed and trying to insert your hand under your waist should be difficult if the mattress is too soft; conversely, if there's a large gap between your waist and the mattress, it may be too firm. You can also sit at the corner of the bed and then stand up to see if the mattress quickly returns to its original shape.