Tìm dấu hiệu nghẹt và đau xoang. Quan sát sự đổi màu của dịch tiết từ mũi. Để ý dấu hiệu ho. Nhận biết viêm xoang do dị ứng mãn tính. Tìm biện pháp chăm sóc y tế.

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?
There are many common symptoms of a sinus infection. One of the main symptoms is sinus congestion. This is typically connected with sinus pain as well. This pain occurs in the areas on and around your nose and is due to the pressure from the inflamed sinus cavity. This pressure often causes headaches.  There may be pain when you move your head forward or when you touch the areas overlying your sinus cavities. The maxillary sinuses, which are under your eyes, may be painful or uncomfortable as we