If it is just a simple sore throat without any other cold symptoms, it could possibly be due to an early stage cold, acute pharyngitis, acute laryngitis, acute tonsillitis, or acute epiglottitis. Some patients may also experience neurogenic pain in the throat area. Overall, there are many possible causes, and it's hard to determine based solely on symptoms. Therefore, it is recommended to visit an ENT (Ear, Nose, and Throat) specialist, who can perform an indirect laryngoscopy or a fiber optic laryngoscopy to clearly observe the specific condition and location of the disease within the throat. Additionally, a complete blood count test can be helpful in determining whether there is an acute bacterial or viral infection causing inflammation. If there is an acute infection causing inflammation, antibiotic treatment may be considered, along with regular follow-ups.