Melody Yazdani, a mother of four, was frustrated for years when her son, Kian, began behaving strangely at home and school.

She took it upon herself to conduct research and find out the reason to her son's erratic behavior, and what she discovered is shocking parents around the world.

"CHILDREN SHOULD NOT BREATHE THROUGH THEIR MOUTHS," she issued a warning on her Facebook. "Not while awake, not while asleep. Never."

If you have a child who "falls asleep immediately after their head hits the pillow, snores, grinds their teeth, wakes up in the night, has night time accidents or daytime accidents, has impulse control issues, is hard to understand when speaking,has under eye circles, has crooked teeth or a misaligned bite, wakes up insanely early, is irritable during the day, or has a bad appetite," Yazdani wants you to pay attention to what she has to say.

The October 24th post already has more than 200,000 shares, and for good reasons.

It all started in first grade, when teachers reported that Kian would push his classmates and "had a hard time controlling his body."

At home, the boy also had an awful temper: "He gets fixated on little things (there is a hair in the shower, it's gross! I can't shower in there! *melt down commences*), his fuse gets shorter and shorter, and he's a picky eater who barely eats."

By second grade, things got worse. Kian would burst out in a temper tantrum and scream at the top of this lungs over anything. At school, he still wasn't getting along with his peers and he was very fidgety.

The concerned mother took her son to see not only a pediatrician, but also a therapist, pulmonologist, for Kian's persistent cough, and an allergist.

"Each doctor is recommending more and more medications - two inhalers for the cough, an antibiotic for the postnasal drip, a steroid, and it goes on and on. The therapist is dancing around ADHD, pushing us in that direction."

But it's when she went to the dentist that she had a light bulb moment.

At a cleaning, Kian's dentist made a comment about how her young boy must be grinding his teeth at night.

"And then lightening struck, right at the perfect time. I stumbled upon an article that changed our life," Yazdani said, adding that she linked the research articles to her post.

She found that there is a connection between ADHD, sleep-disordered breathing, and mouth breathing.

What's most alarming is that sleep deprivation in children and ADHD exhibit the same symptoms.

"Studies have been done where they took medicated ADHD kids, fixed the sleep-disordered breathing, and within 6 months 70% of the children had seen a resolution in symptoms and were no longer medicated."

Why is mouth breathing so bad?

Yazdani stresses that mouth breathing is not normal, and medical professionals also agree.

According to Heathline, mouth breathing can cause facial deformities and poor growth.

The mother explains that "when a child breathes through their mouth, their brain (and body) is not getting enough oxygen. At night, this lowered oxygen saturation is detrimental to the quality of sleep and their brain's ability to get enough rest."

She added that when the tongue cannot rest in the correct place, it can lead to jaw problems, which can cause speech impediments and misaligned teeth.

These narrow pathways can also cut off the airway and contribute to sleep apnea in children.

"To compensate, the body wakes the child and pushes the jaw forward, resulting in disrupted sleep cycles and tooth grinding," she added.

Yazdani hopes that by sharing her story, more parents will be aware of the dangers of children breathing through their mouths.

Fortunately, Kian's story has a happy ending.

"We have seen a complete 180 in behavior. No more angry tantrums, no more fixation on little OCD things, it's been an enormous change," the mother reported.

Yazdani admits that no one ever told her about the dangers of mouth breathing in children, and recommends people who think their children have a similar issue to talk to their doctor.

Click below to check out Yazadani's full post.

Share the mother's story to raise awareness! Did you know that children should never breathe for their mouths?