“softness leads to strength”
In my early training I was prone to forcing and pushing my sound. It limited the range and flexibility of my voice. Frankly, my performances in those days were inconsistent, at best. It was only when I learned to come from a place of softness that my range, tone, and strength all improved dramatically. I learned that when I start from softness, I can really let ‘er rip!
So if your throat hurts when you are singing, you are probably pushing too hard. Take a moment to come back to softness. Just make it as easy as you can and you will be a lot happier.