Pain in the knee joint when squatting is mostly due to inflammation of the knee joint, as the knee joint carries three times the weight of the body when squatting, climbing up and down stairs, or climbing hills. Therefore, patients with knee osteoarthritis especially feel pain in the knee joint when doing such movements, and in severe cases, this can lead to significant mobility problems in squatting, climbing, and going up and down stairs. Most of these patients suffer from degeneration and hyperplasia of the knee bones, or meniscal wear. For these patients, it is important to reduce squatting, climbing, and going up and down stairs, as these movements can be harmful to the knee joint.