I remember eating potato chips when I was a kid, and my gums and the roof of my mouth got swollen, then my tongue and the corners of my mouth started bleeding.
この場合、次のような言い方ができますよ。
ーI remember eating potato chips when I was a kid, and my gums and the roof of my mouth got swollen, then my tongue and the corners of my mouth started bleeding.
「子供の頃、ポテトチップスを食べて歯茎と口蓋が腫れ、舌と口角から出血したのを覚えている」
gums「歯茎」
roof of one's mouth「口蓋」
tongue「舌」
corners of one's mouth「口角」
ご参考まで！
カナダ 
