It has always been said that the eyes are the mirror of the soul. Then, the feet could be the mirror of our general internal health, experts say. 
Our feet reveal many conditions about our health, from thyroid problems to heart problems, and therefore can help us to know the inner workings of our body.
Here are some characteristics that our feet can present along with what that characteristic could mean for our internal health:
1. Cold feet
Always cold feet may be reflecting an underactive thyroid, especially if we also have dry skin and hair.
. Swollen fat fingers
A sore, swollen, red and hot big toe is a very characteristic symptom of gout. The drop is a form of arthritis painful that can cause kidney problems such as kidney stones or kidney failure if untreated. Therefore, by observing our feet we can learn to locate this problem, in order to treat it in time.
3. Frequent foot cramps
Muscle spasms in the feet can be a sign of an electrolyte imbalance in the body, a deficiency of magnesium and potassium, a deficiency of blood sugar or poor blood circulation. Pinched nerves and some medications (such as diuretics) may also be causing these spasms.
4. Unexplained numbness of the foot
On some occasions, numbness or tingling in the feet can be a sign of multiple sclerosis, fibromyalgia or even diabetes.
5. Swollen feet
It is normal that after an injury, or after much activity, our feet swell. But if the swelling does not go away in the first two days it could mean that we suffer from heart failure or kidney disease.
6. Curved nails down
When the toenails have a convex curvature and grow down like a claw, it could be due to lung, heart, liver disease or due to digestive problems.
7. Yellowed and scaled nails
Onychomycosis is usually a benign fungus, but if not treated properly it can cause a loss of mobility or even spread to other points of the body.
