8. Persistent sore throat
Some people have a sore throat due to a viral infection such as cold or flu or a bacterial infection such as diphtheria. Others suffer from a sore throat due to an allergic reaction to mold, pet dander, pollen or other allergens causing the accumulation of excess mucous at the back of their throat.
A sore throat normally does not require medical attention. However, if you have a persistent sore throat (lasting more than a week) and accompanies by other symptoms such as difficulty breathing and swallowing, hoarseness, ear, and neck pain, you should see a doctor.