My son suffers with Osgood–Schlatter disease which causes him extremely painful knees. So we thought we would try Hijama to see if there was any kind of benefits for his pain. Most of his pain is located in the left knee, and you can see in that particular cup you will notice the most extraction of blood. So I was very intrigued to see the results. After a day at work on his feet I checked in to see if there was any difference to his pain. Surprisingly! He mentioned to me before I even asked him the question, that he pain eased tremendously and definitely would recommend it. Fantastic Result!