A dermatologist has revealed the only thing that could be causing pimples to appear on your face.
Dr. Joshua Zeichner, of Mount Sinai in New York, said brushing your teeth after taking a shower can lead to saliva getting on your chin.
This is acidic and is also loaded with bacteria that can irritate the skin, he explained, causing pimples to appear. Toothpaste can also irritate the skin.
Washing your face after brushing is the best way to prevent this, which can be done in the shower or using a simple cloth.
Dentists say everyone should brush their teeth for two minutes twice a day (stock image)


The images above show pimples that dermatologists say can appear on your chin if you brush your teeth after taking a shower.
Speaking exclusively to DailyMail.com, Dr Zeichner said: “Brushing your teeth before showering is a good idea as the water from the shower will help remove any saliva or toothpaste residue from the skin.
“(But) a shower is not necessary, as rinsing the lower face with water after brushing should be enough to do the job.”

Dr. Joshua Zeichner, of Mount Sinai in New York, said brushing your teeth after taking a shower can cause pimples to appear.
Saliva can irritate the skin because it is very acidic and can damage the skin barrier, causing pimples.
It also contains bacteria that can clog facial pores, leading to a buildup of fluid and bacteria inside, causing pimples to appear.
Toothpaste – which is only meant to touch the skin for a short time – can also irritate the skin and cause breakouts.
Dr. Zeichner added: “After brushing your teeth, it is important to wash your face to remove any excess saliva that comes into contact with the skin.
“Toothpaste itself may also be associated with various rashes if it comes into contact with the skin.”
“It is designed for short-term contact with the inside of the mouth, not to sit on the skin.
“Toothpaste can cause redness, dryness and irritation. Fluoridated toothpaste has been linked to a rash called perioral dermatitis, where pimples and bumps develop around the mouth.


Dr. Zeichner said saliva is acidic and contains bacteria that can irritate the skin, causing pimples to appear.
Dentists say everyone should brush their teeth for two minutes twice a day, once in the morning when you wake up and once in the evening before going to bed.
There is some disagreement over whether to brush your teeth before or after breakfast, but experts say it is important to remove saliva from around the mouth after brushing.
Those who argue that people should brush their teeth before breakfast say this is essential because the bacterial population is at its highest in the morning and should be quickly eliminated.
But those who argue otherwise point out that most people aren’t very good at brushing, so it’s best to wait until after breakfast to ensure as many bacteria as possible are removed.
Dentists say you can use an electric or manual toothbrush, although some studies suggest that electric brushes are more effective at removing plaque.
Not brushing your teeth regularly puts a person at higher risk of tooth decay, leading to costly fillings, gum disease, and bad breath.
Many health insurance plans do not initially cover dental care, which must be added for a premium.
But despite the risks, surveys suggest that one in three Americans still don’t brush their teeth daily.
The trick of brushing your teeth before showering was first revealed in a social media video by Turkish medical student Dr Mehravesh SeyyedSayyah, who uses the pseudonym dr.mehss.
She said: “If you plan to shower and have fresh teeth at the same time, brush your teeth first so that showering can help rinse your face of bacteria and micro-remnants. toothpaste afterwards.”