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.
Sometimes, the reason your eyelid is twitching cannot be found. This form of eyelid twitching lasts much longer and is often very uncomfortable. It can also cause your eyelids to close completely. Repeated uncontrollable twitching or spasms of your eyelid (most often the upper lid)