The thumb of the human is corresponding to the circulation system and the nerve system. The strength and weakness of the thumb can reflect the whole quality of your body.
The high-quality thumb should be round, slender, and strong. It will be better if the length of the phalange should be equal. It represents that the owner has good health and good vitality.
If the thumb is too strong and thick, he will be more extreme. He will have irascibility.
If the thumb is too weak and thin, the health of the owner will be bad. He will have neuroticism. He will be lack of power of endurance.
If the thumb is curved, it represents the owner has neurasthenia. His physical strength will decrease.
If the flexibility of the muscle of the thumb becomes weak, it represents that the owner has the myocardial strain. The power of this heart is weak.
If there is a space between the phalange of the thumb and index finger, and the palm line is confused, it represents that the owner tend to be suffered with heart disease.
If there are some blue veins in the phalange, it represents that the owner tend to be suffered from heart disease and arteriosclerosis.
If the thumb becomes thick from second phalange to first phalange, it means that the absorption function of the owner is bad. His health is bad.
If the thumb becomes thick from first phalange to second phalange, it represents that the owner is easy to become fat.