Allergies occur when your body produces histamines after encountering something in the environment that it deems as an intruder. Many allergy symptoms are minor such as watery eyes and sneezing, but others, such as anaphylactic shock, can be life threatening.
When your body comes into contact with an allergens, the immune system produces antibodies that release chemicals called histamines. These histamines are responsible for the symptoms associated with allergies.
In more severe cases, allergies can result in asthma or anaphylaxis, which can be life threatening. Signs of anaphylaxis include:
Allergy treatment will depend on your symptoms, allergens and medical history. The most common treatments include: