1. Skin allergies such as eczema, hives, or dermatitis.
2. Environmental allergies such as sinus allergies which can present symptoms such as congestion, runny nose, sneezing, shortness of breath, asthma, cough, ear pain, dizziness, throat pain, or eye problems.
3. Digestive allergies. Digestive allergies can be complicated in that it is difficult to pinpoint the specific allergen. The most common food allergies are to: dairy, egg, wheat or gluten, corn, chocolate, and nuts. The LEAP test for food allergies can be useful, but there is some debate as to how accurate the results are.
4. Anaphylaxis reactions to specific allergens are severe, life-threatening reactions where often the throat and eyes can swell shut. Other symptoms include: abdominal pain or cramping, difficult breathing, cough, hives, anxiety, dizziness, heart palpitations, or diarrhea. Common anaphylactic substances include peanuts or other nuts, bee or insect stings, medications such as aspirin or sulfa drugs.