A sore throat (throat infection, pharyngitis) is caused when a virus (or bacteria) infects the area at the back of your throat (pharynx). This causes redness and swelling (inflammation), and can be painful, especially when you swallow.Most throat infections are caused by viruses, including the same viruses that cause:1  colds (rhinovirus, coronavirus). 2  flu (influenza A and B viruses). 3  laryngitis and croup (parainfluenza virus).his causes redness and swelling (inflammation), and can be painful, especially when you swallow. Most throat infections are caused by viruses, including the same viruses that cause: 1  colds (rhinovirus, coronavirus). 2  flu (influenza A and B viruses). 3  laryngitis and croup (parainfluenza virus).
Eye twitching is a repetitive, uncontrollable blinking or spasm of the eyelid, usually the upper lid. Eye twitching (blepharospasm) usually affects the eye muscles of both eyes. If you have eye twitching, you may have an involuntary movement that recurs every several seconds for a minute or two.
In its most common form, eye twitching is harmless and stops on its own, although it may recur occasionally. Sometimes, eye twitching may be the earliest sign of a chronic movement disorder, especially if other facial spasms develop in addition to the eye twitching. Usually, however, there is no identifiable cause.Some of the causes of eyelid spasms that have been identified include: 1  Alcohol intake.2  Bright lights.n its most common form, eye twitching is harmless and stops on its own, although it may recur occasionally. Sometimes, eye twitching may be the earliest sign of a chronic movement disorder, especially if other facial spasms develop in addition to the eye twitching. Usually, however, there is no identifiable cause.