Symptoms of Severe Allergies

Allergies are a common medical condition, and you can get them from foods, medications and environmental irritants like pollen or pet hair. Your allergy symptoms may range from mild and annoying to severe and potentially life-threatening if not treated. According to the Mayo Clinic and the National Library of Medicine, symptoms of severe allergies include difficulty breathing and loss of consciousness.

Difficulty Breathing

• You may experience difficulty breathing and wheezing as part of a severe allergic reaction to foods, insect stings, pet dander, or medications.

Rashes

• You may develop rashes on your skin that include redness, itching and hives if you have severe allergies to triggers such as pet dander, medications or foods.

Swelling

• Allergies to foods, medications or insect stings may cause you to develop swelling on your skin or mouth at the site where the allergen came into contact with your body.

Vomiting

• If you experience nausea and vomiting after exposure to an allergen, this symptom is an indication of a serious allergy and requires medical treatment.

Weakness

• You may feel weak, lightheaded or dizzy after exposure to an allergy trigger, and this can lead to loss of balance and fainting.

Anaphylaxis

• Anaphylaxis is a life-threatening condition that you may develop. Anaphylaxis is caused by severe allergies, and symptoms of this include a weak pulse and loss of consciousness.