Osteoarthritis affects around 600 million people globally. It causes pain, stiffness, and reduced joint function—most commonly in the knees, hands, and hips.

Some knee injections for osteoarthritis promise to repair or regenerate the joint. Others claim to decrease pain and make it ...

The body’s defenses may be mildly lowered for about 1 to 4 weeks after a single steroid shot into a joint or near your spine. In some people, particularly with higher doses, this effect may last up to ...