Hi GilliB,
I’m glad to see your symptoms have gone away. You are certainly not the only one who is sensitive or has reacted to some types of memory foam (see here).
There is also more information about latex allergies in post #2 here and the information it links to but the only way to know for sure if you are allergic to latex (which would be very uncommon with the type of latex used in mattresses) would be a latex allergy test. It’s also possible that you were reacting to something else in the mattress (such as glues, a fire barrier, or other substances that may be in the mattress).
What is the make and model of your latex mattress? Many mattresses that are described as a “latex” mattress may only have a thin layer of latex inside it so it may be worthwhile knowing what else is in your mattress.
If you are sensitive to some memory foams and aren’t comfortable with trying other versions and if you aren’t comfortable with latex (at least until you can confirm whether you have an allergy) then that would leave you with some of the other materials that are most commonly found in mattresses which would mainly be polyfoam, innersprings, microcoils, and natural and synthetic fibers. Fortunately there are many mattresses that use these (innersprings and polyfoam in particular). Mattresses that use an innerspring and natural fibers may also be worth considering but they can be more costly. If you are comfortable with polyfoam then I would make sure that it was either manufactured in North America and/or was CertiPur certified.
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There are many people who are sensitive to some materials and not others (or some versions of some materials) but it would be important to make sure what they are so that you aren’t ruling out a material that you would be fine with. This can take some detective work and probably some consultations with your doctor or health professional.
While I can’t advise you about what materials you would be OK with because I would have no way of knowing and because that’s more of a medical issue than a mattress issue … there are many good sources for mattresses that use a wide range of materials in the Los Angeles area and some of the better options and possibilities I’m aware of are listed in post #2 here.
What kind of mattresses have you slept on successfully in the past?
Phoenix