Distribution of the bursae (lubricating pockets) around the knee. These are normal structures, but when there is inflammation in a bursa it fills with fluid and can become hot and painful.

Distribution of the bursae (lubricating pockets) around the knee. These are normal structures, but when there is inflammation in a bursa it fills with fluid and can become hot and painful.

Original article and pictures take https://mendmyknee.com site