10 Surprising Conditions Your Hands Might Predict

From finger length to grip strength, our hands can indicate risk factors for a number of surprising conditions.

Finger length reveals: Arthritis risk

Couple holding hands

Women with ring fingers that are longer than their index fingers, typically a male trait, are twice as likely to have osteoarthritis in the knees, according to an Arthritis & Rheumatism study. Low estrogen levels may be a factor. The same finger feature has been linked to higher athletic ability and verbal aggression in both genders. In men, a significantly longer ring finger (indicating an in-utero testosterone surge during the second trimester) is associated with having more children and better relationships with women, but a higher risk of prostate cancer. Here are 8 things pain doctors do to never get arthritis.

Shaky hands reveal: Parkinson’s disease

open hands of elderly woman in front of dark backgroundFirma V/Shutterstock

Trembling hands could be the result of something as simple as too much caffeine or a side effect of certain medications like asthma drugs and antidepressants. But it’s a good idea to see your doctor if the issue recurs. A tremor in just one hand can be a first symptom of Parkinson’s disease, or it can indicate essential tremor, a disorder that causes uncontrollable shaking and is treatable with therapy or medication. Learn how to spot 8 other easy-to-miss Parkinson’s disease symptoms.

Nail color reveals: Kidney disease

extreme closeup of a male finger detailAaron Amat/Shutterstock

When Indian researchers studied 100 patients with chronic kidney disease, they found that 36 percent had half-and-half nails, when the bottom of a nail is white and the top is brown. The nail condition may be caused by an increased concentration of certain hormones and chronic anemia, both traits of chronic kidney disease.  See your doctor right away if you notice half-and-half nails or a dark, vertical stripe beneath the nail bed. This can be hidden melanoma, a skin cancer. Don’t miss these 10 signs of skin cancer that aren’t on your skin.

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