3.Iliotibial Band Syndrome
The «IT band,» a ligament that runs along the outside of your thigh, can rub against the bone and get irritated and swollen. You’re more likely to get this when you run or ride your bike for exercise. It might hurt more if you go downhill or sit for a while. You may feel better after you warm up, but if you don’t rest the injury and give it a chance to heal, it could get worse.
4.Osteoarthritis
It’s tough to bend or stretch your leg. Your knee feels stiff and sore and may swell after you’ve been moving around. You’ve probably worn down the cartilage, the stuff that helps cushion the ends of your bones. Because that takes time, this kind of arthritis is more common in people 65 and older. If you’re younger, you may get it because you’ve used your knee a lot after an injury, like a ligament tear.
