Biologists explain stress as a negative feeling you experience when your body does not appropriately respond to a threat. Psychosocial stress refers to a specific type you experience that originates from any type of interaction with people.

If you're concerned that your teen might have attention deficit disorder, or ADD, you have probably noticed he has difficulty getting organized and staying on task. His grades may be dropping, or he may complain that he has difficulty focusing.

All medications have the potential to make people drowsy, anti-anxiety medications included. However, some anti-anxiety medications are also prescribed as sleeping pills or muscle relaxants. These include the benzodiazepines alprazolam, or Xanax, and diazepam, or Valium.

Gamma-aminobutyric acid, or GABA, and serotonin are neurotransmitters that help regulate your body’s anxiety level and mood. Although no foods contain GABA or serotonin, you can stimulate your body to produce more of these vital brain chemicals through dietary means.

Intestinal or stomach noise can be a normal part of digestion. Your brain sends a signal to your intestines that triggers the release of digestive fluids as a series of muscle contractions called peristalsis begins. This growling or rumbling lets you know it is time to eat.

Stress, panic attacks, fear and even excitement can send adrenaline levels through the roof, making your heart rate go into overdrive and leaving you unable to feel calm and relaxed. Often people are fearful of these episodes when the symptoms are merely due to negative events and their bodies "fight or flight"

Lithium orotate is a dietary supplement used for the treatment of many ailments and medical conditions by alternative healers. According to LithiumOrotate.com, this supplement is an organic form of lithium, which is an essential mineral in our bodies used for the regulation of many body functions.

Attention deficit/hyperactivity disorder involves hyperactivity, impulsivity and problems with maintaining attention. Individuals with this disorder often have difficulty functioning in day-to-day life. ADHD becomes evident in childhood and often continues into adulthood. As MayoClinic.

Everyone experiences anxiety, irritability and anger. A parent might become anxious when his daughter goes to her first dance in high school or might feel angry when his son brings home a poor report card.

Argentum nitricum, or silver nitrate, has been used in traditional medicine in a diluted solution for antiseptic purposes, although its use has all but disappeared. Silver nitrate, however, is a stock remedy in homeopathic medicine for anxiety.

If you suffer from depression, you are most certainly not alone. According to the National Institute of Mental Health, one of the most prevalent mental illnesses is major depressive disorder. This intense form of the disease affects nearly 7 percent of American adults in a year.

ADHD, or Attention Deficit Hyperactivity Disorder, affects from 3 to 7 percent of all school-aged children, estimates the Centers for Disease Control and Prevention. Children who suffer from ADHD often have trouble paying attention, being calm and socializing, so disciplining a child with ADHD can be a challenge.