Allergy Symptoms

Allergy symptoms can be categorized as mild, moderate, or severe.

Mild Allergy Symptoms
Mild allergy symptoms can include:

Rash
Localized itching
Congestion
Mild allergic reactions do not spread to other parts of the body.

Moderate Allergy Symptoms
Moderate allergic reactions can include symptoms that spread to other parts of the body, including:

Widespread itching
Difficulty breathing
Severe Allergy Symptoms (Anaphylaxis)
Anaphylaxis is a rare, life-threatening emergency in which the response to the allergen is sudden and affects the whole body. Allergy symptoms may within minutes progress to more serious symptoms, including:

Itching of eyes or face
Varying degrees of swelling of the mouth, throat, and tongue that can make breathing and swallowing difficult
Hives
Abdominal pain
Cramps
Vomiting
Diarrhea
Mental confusion or dizziness