Avocado allergies are indicated by anaphylactic reactions after being exposed. MedGuidance.com splits avocado allergies into two categories according to symptoms. People who suffer from itchy lips and throat, swelling and sneezing after eating avocados have an oral allergy, while people who develop sneezing, itching, hives, rashes, nausea or vomiting, diarrhea and shortness of breath have a latex-avocado allergy.
According to MedGuidance.com, most avocado allergy symptoms are mild and can be treated at home, though latex-avocado allergy symptoms can sometimes be life-threatening. Home remedies include drinking green or chamomile tea to relieve itching and hives, applying aloe vera to sooth rashes, drinking pomegranate juice to reduce gastric discomfort and taking an over-the-counter antihistamine.
The American Latex Allergy Association warns that latex allergies are associated with a number of other allergens, including bananas, chestnuts, kiwis, apples, melons and carrots. The American Academy of Allergy, Asthma and Immunology reports that roughly half the people who report latex allergies also react to avocados.
Because avocado oil is found in hair, skin and other cosmetic products, Med-Health.com advises testing for possible allergic reactions by applying a few drops topically and observing the area for a few days. If hives or rashes develop, discontinue use and discard the product.