hi anyone who has faced apple allergies in their LO??

Syera8 • Mommie life💑..Rainbow baby due ❤ 26.10.16 ❤..excited and nervous..praying for my lil miracle😇..so he couldn’t wait for too long to meet us and our lil peanut was born on 29.09.16 via C section.life hasn't been the same since..never felt more complete ❤
My boy is 6 months + gave him stewed apple for the first time.he was uncomfortable after..didn't sleep and was figity..but after say 4 to 5 hrs he started developing a rash.his discomfort was increasing..everything else that he consumed was already given to him earlier so I am narrowing down on the apple.but apple allergy really?? Isn't it unheard of????