Hands Archive

People may relieve anxiety by cracking knuckles or other joints. Usually it's a harmless habit, but people with joint problems like arthritis should refrain, since doing so might worsen symptoms.

A large study published online June 23, 2022, by JAMA Network Open found that poor handgrip strength in midlife was associated with cognitive decline a decade later.

The joint connecting the thumb and wrist is crucial in everyday activities like opening jars or grasping objects, but if osteoarthritis develops, treatment options are limited and don't always work well. A new study has demonstrated the effectiveness of occupational therapy for arthritis in this joint of the hand.

Knuckle cracking doesn't "crack" a joint. The sound comes from gas bubbles bursting in the fluid inside the joint. While knuckle cracking is mostly harmless, other types of noises or the presence of pain can indicate a more serious joint problem.

Osteoarthritis in the hand is a painful condition that is more common in women than in men. While this condition can be debilitating, a number of strategies can be used to manage it, including using various topical, oral, and injected pain medications; splinting the joint; making lifestyle changes; and working with a hand therapist. Surgery may be an option when other measures have failed to control symptoms.

Hand pain or stiffness makes computer or smartphone use difficult. Strategies to combat this include stretching the hands and fingers, avoiding awkward hand positions when holding a smartphone or computer mouse, taking breaks, alternating the fingers that do the work, and taking breaks. Using certain tools can also reduce hand strain or pain. Such tools include voice-to-text features, a wide-grip stylus, a smartphone holder, gel-filled wrist rests, and a comfortable mouse (which might be bigger, smaller, or vertical) to keep hands from stretching too wide or gripping too hard.

Painful conditions like de Quervain's tenosynovitis, inflammation of the tendons that move the thumb, and stenosing tenosynovitis, or trigger finger, when a digit becomes locked, can develop due to overuse or repetitive movement.

Ask the doctors

Q. I was worried about drying my nails with a lamp or light box at the nail salon because of the potential risk of cancer from the ultraviolet radiation, but my salon recently switched to LED lamps. Are they safer?

A. The light boxes used to cure polish during gel manicures, and to dry traditional nail polish, have raised some concern because — like tanning beds — they emit ultraviolet A (UVA) radiation, which is associated with a higher cancer risk. A 2014 study in JAMA Dermatology found that the level of UVA exposure associated with a gel manicure every two weeks probably isn't high enough to increase the risk of skin cancer significantly, but you are wise to be aware of the issue.

The truth – and the myth – behind the cracking knuckles debate

Cracking your knuckles may aggravate the people around you, but it probably won't raise your risk for arthritis. That's the conclusion of several studies that compared rates of hand arthritis among habitual knuckle-crackers and people who didn't crack their knuckles.

The "pop" of a cracked knuckle is caused by bubbles bursting in the synovial fluid — the fluid that helps lubricate joints. The bubbles pop when you pull the bones apart, either by stretching the fingers or bending them backward, creating negative pressure. One study's authors compared the sudden, vibratory energy produced during knuckle cracking to "the forces responsible for the destruction of hydraulic blades and ship propellers."

Can you do anything about hand and finger joint pain?

Everyone experiences the occasional painful hands and sore fingers, but when osteoarthritis strikes, it can put a hold on many aspects of your life.

"As osteoarthritis progresses, you may lose some hand mobility, like the ability to grasp and hold objects," says Dr. Robert Shmerling, clinical chief of rheumatology at Harvard-affiliated Beth Israel Deaconess Medical Center and senior faculty editor at Harvard Health Publishing. "Over time, osteoarthritis can make the joints deformed, so it's harder to open and close your hands."