You wake up feeling like you’ve run a marathon, even though you didn’t work out. Your body feels heavy, sore, and achy—almost like you’re coming down with something. But you’re not sick. What’s ...

Upper body pain can arise from many causes, ranging from benign muscle strain to life-threatening medical emergencies. Knowing when upper body pain is normal or treatable at home, and when it signals ...

Joint pain and weakness can be caused by a number of conditions, including acute injuries, infections, and chronic diseases. The outlook depends on the underlying cause. Share on Pinterest Getty ...

Medically reviewed by Stella Bard, MD Key Takeaways Osteoarthritis often starts on one side of the body and can spread to ...

Testicular pain is pain you feel in one or both of your testicles. Your testicles are the two soft, round structures inside your scrotum, the sac of skin underneath your penis. Testicles make sperm ...