Mút đá viên. Tránh các món ăn có tính axit và thức ăn cay. Nhẹ nhàng khi đánh răng. Uống thuốc giảm đau không kê toa. Mút viên ngậm chứa kẽm. Thử dùng thực phẩm bổ sung vitamin. Uống thực phẩm bổ sung lysine. Uống echinacea (cây cúc dại).

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
Ice can reduce swelling and numb the pain of a canker sore.  If you can, use your tongue to hold a chip directly against the sore until it dissolves.  Keep ice chips in a coffee thermos or a styrofoam cup to prevent rapid melting, and use them throughout the day. If ice chips are too cold for you, try to at least drink cool water throughout the day. Let it sit in your mouth and gently swish it against your sore before swallowing it. Spicy, acidic, and abrasive foods can irritate the sore. This w