What illness do i have if i have a sore throat and feels like flem stuck in my throat?

Sore throat: There are many causes to sore throats, for example tonsillitis, pharyngitis, the common cold, acid reflux, throat muscle strains, or even various growths in the throat. The most common cause is typically the common cold, and for this you can try salt water gargles, but it may still occur.

Usually a cold: Sore throat and phlegm in the throat from a viral upper respiratory infection can last 1-2 weeks. If you're ill (not just miserable) or have a high fever, coughing up blood, weight loss, or symptoms longer than three weeks, see a doctor. Possible causes range from cough due to Lisinopril (a blood pressure drug), asthma, or infections, including "valley fever" or tuberculosis.