Specific phobia in the context of "Fear of heights"

Agoraphobia is an anxiety disorder characterized by symptoms of anxiety in situations where the person perceives their environment to be unsafe with no way to escape. These situations can include public transit, shopping centers, crowds and queues, or simply being outside their home on their own. Being in these situations may result in a panic attack. Those affected will go to great lengths to avoid these situations. In severe cases, people may become completely unable to leave their homes.

Agoraphobia is believed to be due to a combination of genetic and environmental factors. The condition often runs in families, and stressful or traumatic events such as the death of a parent or being attacked may be a trigger. In the DSM-5, agoraphobia is classified as a phobia along with specific phobias and social phobia. Other conditions that can produce similar symptoms include separation anxiety, post-traumatic stress disorder, and major depressive disorder. The diagnosis of agoraphobia has been shown to be comorbid with depression, substance abuse, and suicidal ideation.Without treatment, it is uncommon for agoraphobia to resolve. Treatment is typically with a type of counselling called cognitive behavioral therapy (CBT). CBT results in resolution for about half of people. In some instances, those with a diagnosis of agoraphobia have reported taking benzodiazepines and antipsychotics. Agoraphobia affects about 1.7% of adults. Women are affected about twice as often as men. The condition is rare in children, often begins in adolescence or early adulthood, and becomes more common at age 65 or above.

Blood-injection-injury (BII) type phobia is a type of specific phobia characterized by the display of excessive, irrational fear in response to the sight of blood, injury, or injection, or in anticipation of an injection, injury, or exposure to blood. Blood-like stimuli (paint, ketchup) may also cause a reaction. This is a common phobia with an estimated 3-4% prevalence in the general population, though it has been found to occur more often in younger and less educated groups. Prevalence of fear of needles which does not meet the BII phobia criteria is higher. A proper name for BII has yet to be created.

When exposed to phobic triggers, those with the phobia often experience a two-phase response: an initial increase in heart rate and blood pressure, followed quickly by bradycardia (decreased heart rate) and hypotension (decreased blood pressure). This diminishes cerebral blood supply, and will often result in a fainting response. In an individual with BII phobia, expression of these or similar phobic symptoms in response to blood, injection, or injury typically begins before the age of ten. Many who have the phobia will take steps to actively avoid exposure to triggers. This can lead to health issues in phobic individuals as a result of avoidance of hospitals, doctors' appointments, blood tests, and vaccinations, or of necessary self-injections in those with diabetes and multiple sclerosis (MS). Due to frequent avoidance of phobic triggers, BII phobics' personal and professional lives may be limited. Some may feel that their phobia precludes them from joining a healthcare profession, or from getting pregnant. The phobia is also able to affect the health of those who don't have it; a BII-phobic, for instance, may have difficulty providing aid to someone else in an emergency situation in which blood is present.

Blood phobia (also known as hemophobia or hematophobia in American English and haemophobia or haematophobia in British English) is an extreme fear of blood, a type of specific phobia. Severe cases of this fear can cause physical reactions that are uncommon in most other fears, specifically vasovagal syncope (fainting). Similar reactions can also occur with trypanophobia and traumatophobia. For this reason, these phobias are categorized as blood-injection-injury phobia by the DSM-IV. Some early texts refer to this category as "blood-injury-illness phobia."

According to the DSM-IV classification of mental disorders, the injury phobia is a specific phobia of blood/injection/injury type. It is an abnormal, pathological fear of having an injury.

Another name for injury phobia is traumatophobia, from Greek τραῦμα (trauma), "wound, hurt" and φόβος (phobos), "fear". It is associated with BII (Blood-Injury-Injection) Phobia. Sufferers exhibit irrational or excessive anxiety and a desire to avoid specific feared objects and situations, to the point of avoiding potentially life-saving medical procedures. According to one study, it is most common in females.

Emetophobia is a phobia that causes overwhelming, intense anxiety pertaining to vomit. This specific phobia can also include subcategories of what causes the anxiety, including a fear of vomiting, being vomited on, or seeing others vomit. Emetophobes might also avoid the mentions of "barfing", vomiting, "throwing up", or "puking".

It is common for those who suffer from emetophobia to be underweight or malnourished due to strict diets and restrictions they make for themselves. The thought of someone possibly vomiting can cause the phobic person to engage in extreme behaviors to escape from their anxiety triggers, e.g. going to great lengths to avoid situations that could be perceived as "threatening".

Fear of mice and rats is one of the most common specific phobias. It is sometimes referred to as musophobia (from Greek μῦς "mouse") or murophobia (a coinage from the taxonomic adjective "murine" for the family Muridae that encompasses mice and rats, and also Latin mure "mouse/rat"), or as suriphobia, from French souris, "mouse".

The phobia, as an unreasonable and disproportionate fear, is distinct from reasonable concern about rats and mice contaminating food supplies, which may potentially be universal to all times, places, and cultures where stored grain attracts rodents, which then consume or contaminate the food supply.