People with thick eyebrows generally live longer and have stronger sexual desire than ordinary people. The basis is that Chinese medicine believes that the kidney dominates the hair, indicating that people with thick hair have much better renal function than ordinary people, so they live longer and have strong sexual function.

Eyebrows are also important in human kidneys. Eyebrows with thinking, a person's rigidity, a person's tolerance, a person's emotion and some of a person's personality.