The vast majority of sore throat causes include cold or flu, which are viral infections. Another factors that can lead to this condition are: endotracheal intubation, something stuck in the throat, infectious mononucleosis, breathing through the mouth, viral pharyngitis etc.
Often at the beginning of every cold, people have a mild sore throat which can get worse if the nose or sinuses become infected. Drainage can run down the back of the throat and cause strong irritation, mostly during the night.
Symptoms of sore throat include: pain and difficulty in swallowing, high temperature, swollen lymph nodes, pain in the ears, reddish throat and swollen tonsils etc.
Usually your doctor can diagnose sore throat from the symptoms of the disease but sometimes a swab of the secretions or a blood sample is needed in order to identify the causes. Some specific viruses can lead to sore throat, such as coxsackievirus which can cause blisters in the throat.
If your condition is not too complicated you can fight sore throat on your own. It would be helpful for you to drink warm liquids and consume honey. It is also good to gargle with warm salt water several times a day. In order to soothe a painful and dry throat you may use a cool-mist vaporizer.
Another great remedy for sore throat is making a compress. There are many variations of them so you can choose the one you like the most.