Your knee is a complex piece of equipment: Bones ... a warm feeling in the affected area, this could mean that the bursa — a fluid-filled sac in the knee that helps lubricate the joint ...

Small, fluid-filled sacs called bursae reduce friction between muscles, bones, and tendons around joints. When the bursae become inflamed, it is called bursitis. A person with bursitis will feel ...

“They say they feel a storm coming in their bones and joints,” he says. Join ST's Telegram channel and get the latest breaking news delivered to you.