You need to know these 8 tips before buying a mattress:

• Fiberglass: Avoid mattresses with fiberglass. They're dangerous for your health. Contact their customer service to find out.
• Construction: Mattresses with poor construction tend to sag and last much shorter. Additionally, they contain unhealthy and uncomfortable materials.
• Thin mattresses: Avoid them if you tend to sleep on your side or are overweight. You will wake up with pains and aches.
• Low-density foams: Contribute to back pain. You should choose a denser mattress if you are heavier.
• Best position: Medium firm beds are best for back sleepers, medium to plush beds for side sleepers, and medium firm beds for heavy people.
• Return/warranty policy: Check if the product has a 'no return/no exchange' policy before you buy.
• Price: You get what you pay for. Quality isn't cheap. Before shopping around, read reviews and ask questions.
• Buying online: You may be charged a fee if you return or exchange your bed from an online store. You can avoid pressure selling by reading online reviews.

Not generally.

There can be a 'worst' mattress type for every body type, preference, and budget.

Here are a few quick facts about 3 common mattress types:

• Innerspring: In addition to being comfortable for bounce and sex, innerspring mattresses are also sturdy. Suitable for all three sleep positions. Excellent edge support. The #1 innerspring mattress is the Saatva Classic. Very comfortable and built to last.
• Memory foam: Great choice if you want pressure relief and the feeling of envelopment. Usually suitable for side sleepers, but can be used for back or stomach sleepers, too. There is inadequate edge support. We recommend the Loom & Leaf. Great pressure relief. Ultra-premium 5-lb memory foam mattress for a body-hugging feel.
• Latex: Perfect if you have a higher budget and want better pressure point relief without the enveloping feel of foam. You get the best of both worlds with springs and foam. Ideal for side sleepers. Our top pick is the Zenhaven. Dual-sided, natural latex mattress for buoyant, pressure-relieving comfort.

A low-quality mattress can be the cause of several health issues such as back pain, poor sleep quality, and allergies. Indications of a low-quality mattress include insufficient support, lumps, sagging, and poor cushioning. To avoid purchasing a low-quality mattress, analyze the materials utilized in its construction, the quality of its support system, and its longevity. It's crucial to read reviews from reputable sources, and try the mattress in person before buying.

When investigating the components of a mattress, check for high-quality foams and durable materials that maintain their shape. The support system of the mattress should be robust enough to support your body. Also, ponder on the mattress' durability and look for a warranty that guarantees its longevity.

Reviews from reliable sources, like Wirecutter, can provide valuable insights into the quality and performance of a mattress. Testing the mattress in person before purchasing can give you a better understanding of its comfort and support. Keep in mind, investing in a good-quality mattress is an investment in your well-being, so take the time to research and choose wisely.