In accordance with the four seasons, cautiously start the cold and summer four seasons cold and summer is not only an important condition for the human body to survive, but also the main cause of damage to the human body leading to disease. The human body, in addition to the internal organs, yin and yang qi and blood exist to adapt to the four seasons, the activities of the gods must also adapt to the changes of the four seasons, in order to maintain a clear and quiet internal guard. Older people have a deficiency of Yang Yang Qi and Blood, physiological decline, and weak resistance to disease. If they feel the evil of the four seasons, cold, warm and hot, although not directly related to dementia, but can also lead to paralysis of the veins and veins, stroke, chest paralysis, etc., followed by the complication of dementia. Therefore, the elderly should be in line with the four seasons, the appropriate cold and heat, in order to protect the natural years.