Ακούω τη φωνή μου στη μύτη, ρινικό σπρέι δεν βοήθησε, τι να κάνω;

I have been experiencing intermittent pain on the left side of my throat. Sometimes the pain eases, but it returns again. For about a year, my voice has changed — it sounds like someone with a cold, and my voice often gets hoarse, especially when I try to sing. Recently, this has become much more frequent. I don’t know the reason for it. Could it possibly be related to a thyroid condition?