Lateral thigh pain during and after exercise?

A few things. Check w/ md, in order of frequency: 1.Tight iliotibial (it) bands: learn some stretches from internet & do them when you're warmed up or seek physical therapy. 2.Trochanteric bursitis: might need othopedist and injection especially if thigh hurts when you roll over on it. 3:hip or low back arthritis causing "pinching" of cartilage or nerve. 4:bone pain from weakness, osteoporosis, over-training.