They can. They are the best option for mild anxiety that most of us experience from time to time. There are many instructional books on relaxation exercises (often paired with deep breathing) and meditation, which is a form of relaxation. They are relatively simple to learn. These approaches can provide relief and can be used anywhere once the person understands the method. Mental health professionals can guide the person who needs a more personal approach to learning relaxation or meditation. More
These physiological responses can actually help us to survive. However, sometimes we experience these physiological responses, like an increased heartbeat, that are not in the presence of danger at all, but something else entirely. In these cases, our bodies can misinterpret these physiological signals as being indicators of danger or a "true threat." For example, people may experience learned anxiety due to previous associations between elevated heart rate and panic attacks and may misinterpret bodily sensations as signs of imminent death or loss of control. In this way, one may start to fear these physiological responses, which is what we call "fear of fear" (Craske & Barlow, 2007). "Fear of fear" maintains or perpetuates panic attacks and panic symptoms, which becomes a vicious cycle. In other words, you experience an increased heart rate, which you interpret as negative, which makes you feel anxious, which further makes your heart rate increase and it often spirals from there. These associations may almost happen automatically, even without conscious thought, but this is what is likely going on behind the scenes.
Agoraphobia: This is a fear and avoidance of places, events, or situations from which it may be difficult to escape or in which help would not be available if a person becomes trapped. People often misunderstand this condition as a phobia of open spaces and the outdoors, but it is not so simple. A person with agoraphobia may have a fear of leaving home or using elevators and public transport.
Mindfulness involves spending time focusing on the present moment and using a nonjudgmental stance (things are not good or bad, they just are). This may sound straightforward but it can be tricky as our mind often wanders. Try to spend some time each day focusing on a single activity for 10 minutes. For example, focus on the experience of breathing: noticing the physical sensations that you have, the sound of your breath, the feeling of your chest rising and falling as you breathe, the feeling of air entering and leaving your lungs, etc. Try your best to keep your mind focused on these sensations. If you notice your mind wandering, gently redirect it back to the exercise. Engaging in these exercises on a regular basis can help you to feel emotionally centered. Check out websites, apps, and books for more information on mindfulness and guided mindfulness exercises.
Butterflies in your stomach before an important event? Worried about how you will meet a deadline? Nervous about a medical or dental procedure? If so, you are like most people, for whom some worry about major events (like having a child, taking an exam, or buying a house), and/or practical issues (like money or health conditions), is a normal part of life. Similarly, it is not uncommon to have fears about certain things (like spiders, injections, or heights) that cause you to feel some fear, worry, and/or apprehension. For example, many people get startled and feel nervous when they see a snake or a large insect. People can differ in what causes them to feel anxious, but almost everyone experiences some anxiety in the course of their life.
From a cardiac standpoint, unless coincident heart disease is also present, the prognosis after having chest pain due to an anxiety attack is very good. However, all too often—especially in an emergency room setting where people who have chest pain due to anxiety attacks often wind up—doctors who rule out a cardiac emergency are likely to brush the patient off as having a minor problem of no significance; but panic attacks should not be brushed off.

Selective mutism: A somewhat rare disorder associated with anxiety is selective mutism. Selective mutism occurs when people fail to speak in specific social situations despite having normal language skills. Selective mutism usually occurs before the age of 5 and is often associated with extreme shyness, fear of social embarrassment, compulsive traits, withdrawal, clinging behavior, and temper tantrums. People diagnosed with selective mutism are often also diagnosed with other anxiety disorders.