Question

why we always yawn .......​

Answer 1

Answer:

Causes of excessive yawning

drowsiness, tiredness, or fatigue. sleep disorders, such as sleep apnea or narcolepsy. side effects of medications that are used to treat depression or anxiety, such as selective serotonin reuptake inhibitors (SSRIs) bleeding in or around the heart.

Explanation:

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Answer 2

Answer:

All humans yawn. It cools the brain. Even thinking about yawning can cause you to do it. It’s something everybody does, including animals, and you shouldn’t try to stifle it because when you yawn, it’s because your body needs it. It’s one of the most contagious, uncontrollable actions a body does.

When you start to yawn, powerful stretching of the jaw increases blood flow in the neck, face, and head. Cool air breathed into the mouth cools these fluids. The deep intake of breath during a yawn forces downward flow of spinal fluid and blood from the brain.

You yawn when you’re may be tired because your brain is slowing down, causing its temperature to drop or may be bored because your brain isn’t feeling stimulated and starts to slow down, causing a temperature drop or may be seeing someone else yawn because when you’re in the same environment as them, you’re exposed to the same temperature.

Explanation:

But if you are yawning excessively then here are some causes of excessive yawning:-

1. drowsiness, tiredness, or fatigue
2. sleep disorders, such as sleep apnea or narcolepsy
3. side effects of medications that are used to treat depression or anxiety, such as selective serotonin reuptake inhibitors (SSRIs)
4. bleeding in or around the heart

Although less common, excessive yawning could also indicate:-

1. a brain tumor
2. a heart attack
3. epilepsy
4. multiple sclerosis
5. liver failure
6. body’s inability to control its temperature