Hmmmm. Is there a known reason for your sore throat? Strep? Acid reflux? Coughing? Speaking too loudly? Snoring (granted more soft palate than throat but hey)? Smoking?
Some sore throats are caused by a more environmental reason, such as sleeping in the same room as an ashtray that has some stubs in it.
For obvious reasons, if you have an undiagnosed medical reasons, you should consult a doctor to get to the bottom of this.
I used to suffer from both a strep throat and from acid reflux. Each needed different treatment. When my throat was inflamed for whatever reason I would gargle with warm, salted water for 5 minutes (large mug). That worked wonders. I also avoided alchohol at a time when I was singing (it dries out your vocal chords) and I drank pineapple juice. Other than that I made sure I was properly hydrated with simple water. That last one can make a big difference.
At the other end of things working through a set of warm up exercises helps reduce throat strain.