Scientists think they may have solved an old question about the cracking of knuckles: Why does it make that sound? The crack apparently comes from a bubble forming in the fluid within the joint when ...

Whether you love it or hate it, cracking knuckles is a common habit we've likely all done at some point. It's one of life's simple pleasures for some people, who crave the satisfying "pop" and ...

There's a new twist in the debate about why knuckles crack. Yes, it turns out that "why knuckles crack" is actually a debate — despite the existence of the phenomenon for approximately all of human ...

Throbbing, aching, or shooting pain in the knuckles can result from an injury or an underlying medical condition, such as arthritis or a cyst. The treatment for knuckle pain may depend on the ...

Moms who hate hearing kids crack their knuckles aren't going to like hearing this: Those threats that knuckle-cracking will cause arthritis just aren't true. Dr. Kevin deWeber, a sports and family ...

Dark knuckles can indicate a metabolic condition, medication side effect, or other condition. Dark patches of skin can occur due to hyperpigmentation, which happens when the skin produces more melanin ...

Dark knuckles, also known as hyperpigmentation of the knuckles, can be a source of self-consciousness for many individuals. While they are usually harmless, dark knuckles can be a sign of an ...