Eight million U.S. millennials have been diagnosed with arthritis. A surprising cause? Overdoing it on high-impact workouts (think CrossFit and brutal boot camps) that tax your joints, says David T. Neuman, M.D., founder of Pop-Doc.com. Ignoring the pain could lead to loss of mobility and surgery. (No thanky!) If your knees or hips feel unusually creaky, try…
Icing them. Apply ice (covered in a T-shirt) to the joint for 20 minutes at a time, up to five times a day, for three days. The cold reduces inflammation.