Hip/Glute problem

We have a serious problem here. The pain when I'm running is huge. I only keep going as I know it's not a pulled muscle. The problem seems to be coming from my hip joint and radiating out to the glute muscles. It's much much worse going up an incline and eases coming down hill. I can only describe it as feeling like an acute pulled muscle and 'inflamed' pain in the hip. Lord alone knows what it is but it's a real problem, turning what should be my strongest discipline into one I can barely get through.