Others say that fingernails drum well, but my hands are flat, not very drum. They all say I lack calcium. Is it true?/You don't say. /You don't say.

Calcium deficiency, the whiter, the more. The middle part is flat and the normal part should be convex. Eat more calcium and more fruits and vegetables.

Nail and disease prediction

The analysis of nails began in ancient times. Doctors in his school advocate nail analysis, which has been used to this day, but most people don't know that small nails can truly reflect human health.

The back of the nail is high upward, and the periphery of the nail is bent downward. Nails of this shape may indicate emphysema, tuberculosis, cardiovascular diseases, ulcerative colitis and cirrhosis.

The crescent-shaped place at the base of the nail is blue, which indicates that it may suffer from one of the following diseases: blood circulation disorder, heart disease, Lei Nuode's syndrome-finger and toe arterial spasm, usually caused by extreme cold, and sometimes associated with rheumatoid arthritis or autoimmune disease lupus erythematosus.

Nails are sunken, flat or spoon-shaped. This is related to iron deficiency anemia, syphilis, thyroid diseases and rheumatic fever.

Lindsay manicure (also known as two-color manicure). The half near the nail tip is pink or brown, and the half near the protective film is white. This kind of nail may be a sign of chronic renal failure.

There are parallel deep grooves on the nails. This is caused by malnutrition or any serious disease that temporarily prevents nail growth, such as measles, epidemic costaitis, heart disease and carpal tunnel syndrome.

Most of the skin under the nails is white, and the normal pink area of the fingertips is reduced and banded. This kind of nail may indicate cirrhosis.