Doc, 2 days ago until this momment my right knee suddenly ache when i was walking.. it's hurt when my leg straight... can i know the treatment? thx

Something inside kne: This can suggest a problem inside the knee. A cartilage problem is the most common reason. It could be a torn meniscus. There are other things that can occur inside the knee: a joint mouse - such as a cartilage piece that is loose, a loose bone, a loose calcium deposit some type of debris. It would be like having a marble or a bee-bee inside your knee blocking its motion - inside.