Question

what are the clinical signs of food allergies?

Answer 1

SYMPTOMS AND SIGNS OF FOOD ALLERGY

Food allergies usually have a fast onset (from seconds to one hour) and may include

• Rash
• Hives[13]
• Itching of mouth, lips, tongue, throat, eyes, skin, or other areas
• Swelling (angioedema) of lips, tongue, eyelids, or the whole face
• Difficulty swallowing.
• Runny or congested nose
• Hoarse voice
• Wheezing and/or shortness of breath
• Diarrhea, abdominal pain, and/or stomach cramps
• Lightheadedness
• Fainting
• Nausea
• Vomiting

In some cases, however, onset of symptoms may be delayed for hours.

Symptoms can vary. The amount of food needed to trigger a reaction also varies.

Serious danger regarding allergies can begin when the respiratory tract or blood circulation is affected. The former can be indicated through wheezing and cyanosis. Poor blood circulation leads to a weak pulse, pale skin and fainting.

A severe case of an allergic reaction, caused by symptoms affecting the respiratory tract and blood circulation, is called anaphylaxis. When symptoms are related to a drop in blood pressure, the person is said to be in anaphylactic shock. Anaphylaxis occurs when IgE antibodies are involved, and areas of the body that are not in direct contact with the food become affected and show symptoms. Those with asthma or an allergy to peanuts, tree nuts, or seafood are at greater risk for anaphylaxis