Ngậm kẹo thông cổ hay kẹo ho. Sử dụng thuốc kháng histamine. Dùng thuốc trị nghẹt mũi. Sử dụng thuốc phun cổ họng. Sử dụng nước súc miệng. Đi khám bệnh.

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?
Regular throat lozenges don't do much to heal your throat, but they do alleviate the pain.  The extra saliva you produce with the candy in your mouth will lubricate the throat to relieve the itchy feeling. Meanwhile, the medication in the drop acts as a local anesthetic which numbs the irritation in the throat. Antihistamines block histamine, a chemical in your body that can cause an itchy throat. Benadryl, Zyrtec, and Claritin are just a few brands of cold and flu antihistamines that are design