Osteoarthritis is also a chronic, quantitative process, so are there any “warning signs” that tell us before it happens? If any of the following symptoms occur within or around a joint and persist for more than 2 weeks, you should consult your doctor as soon as possible. The following signs indicate that the body has given a “yellow light” warning. For osteoarthritis, early detection and treatment is most important. 1. “Weak legs” when going upstairs. If you are still very young, but often when you go upstairs, you have “weak legs” (feel weak, sore knees), which is medically known as chondromalacia patellae. Then it is time to go to the hospital as soon as possible for an examination. Oral medication, intra-articular injection of sodium vitreous acid, massage, and physical therapy can relieve the pain. In particular, the treatment of intra-articular sodium glass acid injection is a kind of protection for the joint, and the effect can be maintained for 3 months to a year. 2.Pain. In the early stage of osteoarthritis, the pain appears after a night’s rest, disappears after a little activity, and then occurs again after activity. 3. Difficulty in joint movement. Difficulty in joint movement and stiffness may occur occasionally in the early stages, but may become more frequent and progressively worse as the disease progresses. 4. Swelling. Swelling can be seen in superficial joints, such as knee joints and elbow joints.