Products that contain bismuth can temporarily turn your tongue black, according to Atlas of Adult Physical Diagnosis. Other Causes If you have a black tongue, then you could have a fungus called Aspergillus niger growing on the surface of your tongue. If you have too much bacteria growing in your mouth, it could cause your tongue to appear black and hairy, according to the Mayo Clinic.
In addition, a child is said to have a cognitive delay and/or a learning disability when they are performing at least two grade levels below their peers. For example, a third grade class is learning their multiplication tables, but a student with a cognitive delay would be performing math on a first grade level.
âIt is also meant to avoid the disruptive ethnic divisions that reside in partisan politics.â âThe pupils said the boy was known for his disruptive behaviour and had been acting up in the lesson that day.â âTheir disruptive behaviour means that they often miss much of the teaching that is going on.â âAt an early age he began to show signs of stubborn and disruptive behavior.â âThey have brought these children up to be disruptive and offensive.â