The aging of human organs is a normal physiological phenomenon, and the aging time of each organ varies from person to person and from organ to organ. Research shows that the brain begins to age at the age of 20, and the number of nerve cells in the brain gradually decreases after the age of 20, affecting memory and coordination. The eyes begin to age at age 40, when the eye muscles become weaker and the ability to focus gradually decreases. The heart begins to age at age 40. The heart’s ability to deliver blood gradually decreases, and less blood is transported to the heart, which can lead to angina pectoris. Lung capacity begins to decline slowly at the age of 20, and the respiratory muscles and chest cavity gradually stiffen, leading to dyspnea. The liver is generally able to resist the aging process due to the high regenerative capacity of liver cells. The filtration function of the kidneys starts to decrease from the age of 50, and urinary frequency and urgency begin to occur. Patients are advised to seek timely medical attention for any discomfort. Organ aging is an inevitable process of human metabolism, maintain an optimistic mindset and increase physical exercise.