Why is My Toilet Seat Turning Blue? – 4 Main Reasons

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Paulk Webb


Freddie J. Hagopian

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why is my toilet seat turning blue

You may only be familiar with the brown stain and toilet rings. Why is my toilet seat turning blue? Some may find it strange to find a blue stain on a toilet seat.

Don’t freak out, as it can happen due to your blue clothing. Pregnancy and chromhidrosis have something to do with it as well. Why clothing can leave a blue color on your toilet is easy to understand. The other causes need explanations.

This article will clarify everything about the causes of why toilet seats turn blue. Aside from the explanations, you’ll also learn how to remove the blue stain, so there is no need to spend a lot of time browsing a lot of comments on Reddit.

Reasons Why My Toilet Seat Turned Blue

When the toilet seat changes color to blue, don’t think about something bizarre that took place. What causes this phenomenon that happens all of a sudden? Here are the reasons for the blue toilet seat stain.

1. Toilet Water


It’s normal to blame toilet water for the stains on your toilet. It turns blue when there’s corrosion on your copper plumbing system. But note the stains caused by copper are usually blue-green.

2. Blue Clothing

You may not have noticed it, but the dye of your blue jeans or pants transfers to your upper legs or thighs. The color will stick to the porcelain when you sit down on a toilet. But this rarely happens.

If the dye from clothing caused the toilet seat discoloration, you could wipe it, and it’s gone for good.

3. Pregnancy


Although there is no medical proof to back up this claim that pregnancy causes the blue stain on your toilet seat, some things make sense. They naturally happen during pregnancy, and the following discussions prove the occurrence.

  • Pregnancy hormones

A lot of hormones are involved during pregnancy. They are estrogen, progesterone, relaxin, prolactin, oxytocin, placental growth factor, human placental lactogen, and human chorionic gonadotropin.

There’s no specific hormone to blame. Blue toilet seat pregnancy can happen because of hormonal imbalance. If this issue persists for quite some time, you have to talk to your doctor about it.

You might have heard about myths connected to pregnancy hormones. One of them is having a toilet seat turning blue male baby effect. In detail, it’s the testosterone increase when you’re having a baby boy. However, there’s no adequate scientific explanation for this cause.

Is it also possible to have a PCOS blue toilet seat? So far, it’s not listed as the cause of blue toilet seats.

  • Prenatal vitamins

Some prenatal vitamins may contain folic acid and potentially blue-colored dye that sticks to the toilet. You may discuss this with your doctor. If it bothers you, you may change your vitamins.

4. Chromhidrosis


If you’re not pregnant, you can consider the possibility of a chromhidrosis blue toilet seat. It’s a condition wherein bodily fluids like urine and sweat turn blue or gray.

A phenomenon of the blue toilet seat cover can happen because of the high level of lipofuscin in the body.

Ways to Clean Up a Blue Toilet Seat

When you fix a blue toilet seat, it’s just doing the regular cleaning, but you have to be particular with the products.

  • Rubbing alcohol

Rubbing alcohol has the reputation of erasing color on surfaces like porcelain. Get a clean cloth and dip it in the alcohol.

Place the soaked part on the stained area. Let it stay for 10 to 15 minutes to dissolve the stain.

  • Bleach

If you choose to use bleach, cover your floor and other objects so they won’t be at risk of damage.

Mix the same amount of water and bleach and apply it on the affected area. Give it a few minutes before wiping.

  • Vinegar and baking soda

This classic pair of cleaning substances can deal with the blue stain on your toilet.

Put 1 or 2 cups of vinegar on the stained surface. Then, you can add the same amount of baking soda. You can add more if necessary.

You’ll need a brush to scrub the stained area. Keep on scrubbing until the stain is gone. After cleaning, rinse your toilet with water.



How to prevent blue stains on your toilet seat?

Learn about prevention if you don’t want to be bothered by blue stains. Here are some steps.

  1. Make sure that you don’t use acidic water in your toilet.
  2. Clean the toilet regularly. Don’t miss the schedule.
  3. Use a natural cleaner to ensure that the toilet surface won’t be damaged.
  4. Aside from cleaning, users should do their part. Flushing every after-use is the best way to prevent any stains from forming.
  5. Take some time scrubbing your toilet, even just once a day.

What does it mean when your toilet seat turns blue?

As mentioned, your toilet seat turns blue due to the blue dye of clothes, hormonal changes, and chromhidrosis. Blue-green water from copper corrosion on plumbing can also leave stains on your toilet seat.

Should I see a doctor when my toilet seat turns blue?

If you think about blue toilet seat diabetes or blue toilet seat cancer, you may want to see a doctor. But you should know that diabetes usually leaves mold on your toilet. It happens because of the extra sugar that nourishes mold growth.

Some breast cancer survivors only experienced the toilet seat turning purple. But they discovered that the cause is their intake of B complex vitamins.

You need to see a doctor when your toilet seat turns blue to confirm pregnancy and chromhidrosis. You can also use a pregnancy kit to check. It’s your choice to set an appointment with a doctor for health advice.

Chromhidrosis is not a serious skin condition. But there are other causes of colored sweat, like infection, poisoning, jaundice, and bloody sweat or hematidrosis. The doctor can run a test to have the exact diagnosis.

You have to talk to your doctor about the food you ate and the chemicals you have had contact with in the past 2 to 3 weeks. This is a way to determine the triggers and culprits of chromhidrosis.


Why is my toilet seat turning blue? You know the answers to this question. They’re hormonal changes during pregnancy, prenatal vitamins, chromhidrosis, blue clothing, and toilet water.

With a color-changing toilet seat, your main concerns are the toilet’s cleanliness and your health condition. Regular cleaning can keep the whole toilet away from stains. See a doctor if you want to be sure about your health status.

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