Mouth Itchiness After Eating Fresh Apples

People can be allergic to fresh apples but not applesauce..

Why does my mouth itch when eating fresh apples, but not with applesauce?

These symptoms are most likely due to something known as an oral allergy syndrome, caused by apples. The oral allergy syndrome (OAS) is a form of food allergy that is caused by a person having an allergy to a particular pollen. The pollen, in this case birch pollen, has similar proteins found in a certain fruit, in this case apple, which causes a person to be allergic to both.

When a fresh apple is eaten, a person may experience itching, burning, or stinging sensations of the mouth, throat and tongue. The symptoms generally last only a few seconds or minutes, as the proteins that cause the symptoms are broken down quickly by saliva. Since cooking, baking or processing the food (as is the case with applesauce) breaks down these proteins as well, a person with OAS to a fresh apple can eat applesauce without symptoms.

Want to find out more? Read the full-length article on the oral allergy syndrome.


1. Sicherer SH. Clinical Implications of Cross-Reactive Food Allergens. J Allergy Clin Immunol. 2001; 108:881-90.

2. Ortolani C, Ispano M, Pastorella EA, Ansaloni R, Magri GC. Comparison of Results of Skin Prick Tests and RAST in 100 Patients with Oral Allergy Syndrome. J Allergy Clin Immunol. 1989; 83:683-90.

3. Sampson HA. Adverse Reactions to Foods. In: Adkinson NF, Yunginger JW, Busse WW, et al, eds.

Middleton’s Allergy Principles and Practice. 6th edition. Philadelphia: Mosby Publishing; 2003:1619-1643.

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