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Why do we cry when we cut onions? - When we prepare a dish with this delicious vegetable, we often end up crying. Do you know why?

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Crying while cutting onions - Onions release a chemical substance that produce a gas, according to The New York Times.

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Crying while cutting onions - After reaching the sensory nerves in our eyes, the gas causes us to tear up as a sort of defense mechanism.

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Why do we get goosebumps? - Sometimes we get goosebumps when we hear a song that evokes an emotional response or when we feel cold. Why does this happen?

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Why does our body have reactions that we cannot control? -

Goosebumps are often related to lower temperatures. To lessen the feeling of being cold, the brain stimulates the little hairs on our body.

The same explanation goes for when we experience fear or happiness.

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Why do we hiccup? - Regardless of how hiccups develop, they are incredibly annoying.

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Hiccups - This response challenges specialists who aren't completely certain about why we hiccup. However, according to Medical News Today, they can occur as the result of a disturbance in neural pathways in our brains.

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Hiccups - In accordance with the same publication, persistent hiccups can be a sign of problems in the brain, spinal cord, or chest wall. If you have a case of pesky hiccups, you should seek out medical help.

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Why do we get cramps? - Have you ever been sitting or out walking and felt an inexplicable cramp that feels like a serious physical injury? Do you know why that happens?

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Cramps -

Cramps can be a sign of dehydration or a mineral deficiency of potassium, calcium, or magnesium, according to Prevention.

This unpleasant sensation isn't limited to sedentary folk. While exercising, you can get a cramp as you lose minerals through sweat. The tip is to eat well.

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Why do our eyelids quiver? - Do you know why you suddenly feel your eyelid twitching?

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Eyelid twitches -

Eyelid spasms can have various causes, including fatigue, stress, and excess alcohol or caffeine, according to Health Line.

Normally, the twitches don't indicate anything serious and stop on their own. Of course, if the problem persists, it's best to see a doctor.

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Why do we yawn when someone else does? - Yawning can be a sign that you're tired but why do you yawn when you see someone else doing it?

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Contagious yawning - According to TIME, it can be a sign of empathy, such as smiling or frowning when someone else shows the same reaction.

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Contagious yawning - Younger people are more likely to experience this effect than older people.

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Why do we experience pins and needles? - Have you ever felt your foot fall asleep or had that sensation of pins and needles in certain areas of your body?

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Pins and needles - The scientific name of this sensation is temporary paresthesia, according to Health Line.

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Pins and needles - Too much pressure on a nerve for an extended period of time can cause this sensation, according to a specialist on CNN.

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Why do we have reflexes? - Have you ever been cooking and suddenly stopped a fork from falling on the floor?

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Acting on reflex -

Braking suddenly in a dangerous situation or turning the wheel to avoid an accident are the cause of reflexes. According to specialists, reflexes are not processed by the brain and are automatic and immediate, as shown on the BBC.

The reflex arc occurs when stimulated receptors send signals to the spinal cord and activate motor neurons without needing to be processed in the brain first.

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Why do our ears burn and get red? - Have you heard that when your ears get red and feel like they're burning it means someone is saying bad things about you?

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Burning, red ear - One of the reasons that we actually have this sensation is a dilation of the blood vessels, according to Live Strong.

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Burning, red ear - Excess sun exposure can also explain the sensation. According to the same site, another common cause is hormonal alterations.

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More doubts? - See also:  Why did we start removing our body hair?

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