As people get older and become less sensitive to smells, they need to be vigilant.

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　　Our tongues are covered with taste buds, and the taste buds in each area sense different tastes. The tip of the tongue senses sweetness, the side of the tongue senses sourness, the base of the tongue senses bitterness, and the surface of the tongue senses salty taste. According to traditional Chinese medicine, the five flavors are sour, bitter, sweet, pungent and salty, which enter the liver, heart, spleen, lungs and kidneys respectively.
　　
　　When a certain organ undergoes pathological changes, abnormal taste sensation corresponding to the organ will appear. Therefore, when the elderly's taste suddenly changes and the more they eat, the saltier they eat, it actually reflects their health status and even prompts disease information.
　　
　　The elderly's taste is heavy and sour, which indicates liver fire or weakness of the spleen and stomach. A bitter taste in the mouth indicates heat in the liver, gallbladder, intestines and stomach, and abnormal bile excretion. Sweet mouth indicates that there is heat in the spleen. At this time, the digestive system is dysfunctional and the amylase content in saliva increases, which stimulates the taste buds on the tongue and makes the mouth feel sweet. Spicy mouth, with strong liver fire, Kidney deficiency Most people have phlegm and heat.
　　
　　Children should pay attention to changes in their parents' tastes.