Not to be confused with hemostasis. Homeostasis or homoeostasis (homeo- + -stasis) is the property of a system in which variables are regulated so that internal conditions remain stable and relatively constant. Examples of homeostasis include the regulation of temperature and the balance between acidity and alkalinity (pH). It is a process that maintains the stability of the human body's internal environment in response to changes in external conditions.
Allergies, also known as allergic diseases, are a number of conditions caused by hypersensitivity of the immune system to something in the environment that usually causes little problem in most people.
Spring is the most common time of the year for people to experience seasonal allergy symptoms. As the weather gets warmer and plants start to bloom, trees and grasses release pollen into the air, triggering allergic symptoms in those with seasonal allergies. Colorful flowers also bloom in the spring and are often blamed as the cause of spring allergies.