How to Get Urine Stains Out of a Mattress
Urine stains on a mattress are something almost every household deals with at some point. If you are looking for a reliable way to get urine stains out of a mattress, you are in exactly the right place. This guide covers every type of urine stain, from a fresh wet patch to an old yellow mark that has been sitting there for weeks.
No expensive products needed. No professional cleaner required. Just simple methods that genuinely work.
Quick Links
- Understanding Urine Stains on a Mattress
- What You Will Need
- Removing Fresh Urine Stains
- Removing Old Yellow Urine Stains
- Urine Stains on Memory Foam
- How to Prevent Future Stains
- Frequently Asked Questions
Understanding Urine Stains on a Mattress
A urine stain is not just discolouration on the surface. When urine soaks into a mattress and dries, it leaves behind a combination of uric acid crystals, urobilin pigment, and ammonia compounds. These are what cause the yellow staining and the unpleasant smell that often comes with it.
According to the CDC, ammonia is a chemical compound that can irritate the airways and skin at even low concentrations, which is one reason why urine stains in the bedroom environment are worth treating properly and promptly rather than leaving them to linger.
The older the stain, the more these compounds have bonded with the fabric. This is why fresh stains are much easier to remove than old ones, but both are very treatable with the right approach.
What You Will Need
- Cold water
- Distilled white vinegar
- Baking soda
- 3% hydrogen peroxide
- Liquid dish soap or laundry detergent
- Clean white towels or paper towels
- Spray bottle
- Vacuum cleaner with upholstery attachment
How to Remove Fresh Urine Stains From a Mattress
If you have caught the accident early, you are in the best possible position. Fresh urine has not yet fully bonded with the fabric, so it comes out much more easily.
Start by blotting up as much liquid as possible with clean towels. Press firmly from the outer edge of the stain inward. Never rub. Once you have blotted everything you can, mix one cup of cold water, one cup of white vinegar, and one tablespoon of laundry detergent in a spray bottle. Spray this generously over the stain and leave it for 15 minutes.
After 15 minutes, blot it up again with fresh towels. Then cover the entire area with a thick even layer of baking soda. Leave it overnight and vacuum it up in the morning. For most fresh stains, this one round is all you need.
How to Remove Old Yellow Urine Stains From a Mattress
Old urine stains that have turned yellow need a stronger approach. The urobilin pigments have had time to bond deeply with the mattress fabric, and vinegar alone is not enough to fully break them down at this stage.
This is where hydrogen peroxide comes in. Lightly mist the stain with cold water first to soften the surface. Then mix one cup of 3% hydrogen peroxide with three tablespoons of baking soda and a few drops of dish soap. Spray this directly onto the old stain and leave it completely alone to air dry. Do not blot or touch it while it dries.
Once fully dry, vacuum off all the residue and check the stain. You should see a clear improvement after one round. If a mark remains, repeat the process. Old stains may need two or three rounds of this treatment before they are fully gone. Be patient and keep going.
Always test hydrogen peroxide on a small hidden area of your mattress first. It can lighten some fabrics and it is better to know this before applying it to a visible area.
Urine Stains on Memory Foam Mattresses
Memory foam requires extra care because it absorbs liquid much faster than standard mattresses and takes much longer to dry. If you are dealing with a urine stain on a memory foam mattress, use less cleaning solution than you would on a regular mattress and blot more thoroughly after each step.
Never soak a memory foam mattress. Too much liquid can permanently damage the foam structure. Allow at least 24 hours of drying time and use a fan to help speed up the process. For a full guide on this, visit our article on how to get urine out of a memory foam mattress.
How to Prevent Urine Stains on Your Mattress
Once your mattress is clean, the smartest move you can make is to protect it going forward. A waterproof mattress protector creates a barrier between your mattress and any liquid. Future accidents will never reach the mattress itself. The protector simply gets removed and tossed in the washing machine.
If bedwetting is a regular occurrence in your household, a mattress protector is genuinely essential and one of the best investments you can make for the longevity of your mattress.
Need More Help?
If the smell is still present after the stain is gone, read our guide on how to get urine smell out of a mattress. If you are dealing with pet urine, see our guides on how to get cat pee out of a mattress and how to get dog pee out of a mattress for the right approach.
For everything covered in one place, visit our full guide: How to Get Urine Out of a Mattress: The Complete Guide.