Anaphylaxis or anaphylactic shock is a life-threatening allergic reaction. It occurs when an individual reacts to an exposed substance. This can include anything from a bee sting to a peanut. According to MayoClinic.com, during anaphylaxis, the immune system releases many chemicals. This can cause an individual to go into shock. It is an emergency condition and may result in death. According to MedlinePlus, the clinical manifestations of anaphylactic shock include hives, constriction of the airways and a weak pulse.
Hives
According to MedlinePlus, hives may be a clinical manifestation of anaphylaxis. An individual in this condition may experience various skin reactions, and hives is one these reactions. The individual may also develop itching. The skin may become blue due to lack of oxygen or pale due to the shock.
Airway Constriction and Swelling
According to MedlinePlus, constriction of the airways is a clinical manifestation of anaphylaxis. When the airways of an individual become constricted, the person finds it difficult to breathe. A whistling sound known as wheezing may be heard when the individual is breathing. Abnormal high-pitched breathing sounds may also be heard. The throat can become swollen and the swelling can be severe enough to block the airway. It may also make it difficult for the individual to swallow. Swelling may also develop on the lips, eyes or tongue. Pulmonary edema, where fluid collects in the lungs, is another sign of anaphylaxis.
Weak Pulse
According to MedlinePlus, a weak pulse is a clinical manifestation of anaphylaxis. MedlinePlus says that the pulse of the individual may become weak or rapid. The individual may also have an abnormal heart rhythm, a condition known as arrhythmia. The individual may also have palpitations, and his blood pressure may drop. The individual may also show signs of mental confusion or lack of mental clarity. His speech may also be slurred and unclear. The person may complain of feeling faint and dizzy.


