Answer:
When we sense danger, the brain reacts instantly, sending signals that activate the nervous system. This causes physical responses, such as a faster heartbeat, rapid breathing, and an increase in blood pressure. Blood pumps to muscle groups to prepare the body for physical action (such as running or fighting). Skin sweats to keep the body cool. Some people might notice sensations in the stomach, head, chest, legs, or hands. These physical sensations of fear can be mild or strong.
This response is known as "fight or flight" because that is exactly what the body is preparing itself to do: fight off the danger or run fast to get away. The body stays in this state of fight–flight until the brain receives an "all clear" message and turns off the response.
Sometimes fear is triggered by something that is startling or unexpected (like a loud noise), even if it's not actually dangerous. That's because the fear reaction is activated instantly — a few seconds faster than the thinking part of the brain can process or evaluate what's happening. As soon as the brain gets enough information to realize there's no danger ("Oh, it's just a balloon bursting — whew!"), it turns off the fear reaction. All this can happen in seconds.
Certain fears are normal during childhood. That's because fear can be a natural reaction to feeling unsure and vulnerable — and much of what children experience is new and unfamiliar.
Young kids often have fears of the dark, being alone, strangers, and monsters or other scary imaginary creatures. School-aged kids might be afraid when it's stormy or at a first sleepover. As they grow and learn, with the support of adults, most kids are able to slowly conquer these fears and outgrow them.
Some kids are more sensitive to fears and may have a tough time overcoming them. When fears last beyond the expected age, it might be a sign that someone is overly fearful, worried, or anxious. People whose fears are too intense or last too long might need help and support to overcome them.
Some phobias develop when someone has a scary experience with a particular thing or situation. A tiny brain structure called the amygdala (pronounced: uh-MIG-duh-luh) keeps track of experiences that trigger strong emotions. Once a certain thing or situation triggers a strong fear reaction, the amygdala warns the person by triggering a fear reaction every time he or she encounters (or even thinks about) that thing or situation.
Someone might develop a bee phobia after being stung during a particularly scary situation. For that person, looking at a photograph of a bee, seeing a bee from a distance, or even walking near flowers where there could be a bee can all trigger the phobia.
Sometimes, though, there may be no single event that causes a particular phobia. Some people may be more sensitive to fears because of personality traits they are born with, certain genes they've inherited, or situations they've experienced. People who have had strong childhood fears or anxiety may be more likely to have one or more phobias.
Having a phobia isn't a sign of weakness or immaturity. It's a response the brain has learned in an attempt to protect the person. It's as if the brain's alert system triggers a false alarm, generating intense fear that is out of proportion to the situation. Because the fear signal is so intense, the person is convinced the danger is greater than it actually is.
Explanation:
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