Symptoms are different: people with yin deficiency often feel hot flashes inside the body, sweating easily, thirst, insomnia, upset, feverish, dry mouth and so on. People with yang deficiency often feel cold inside the body, afraid of cold, fatigue, dizziness, forgetfulness, insomnia, dreaminess, cold hands and feet, etc.
Observe tongue coating: People with yin deficiency have red tongue coating and teeth marks on both sides of the tongue. The tongue coating of people with yang deficiency is mostly white, and there are no tooth marks on both sides of the tongue.
Look at the mental state: people with yin deficiency are prone to fatigue and lack vitality and energy. People with yang deficiency have a better mental state and are easy to get tired but not easy to recover.
Observe the defecation situation: people with yin deficiency are prone to constipation or diarrhea and have poor defecation. People with yang deficiency are prone to diarrhea or constipation and poor defecation.
Look at the cold and warm limbs: people with yin deficiency feel cold in their limbs, while people with yang deficiency feel hot in their hands and feet.
Look at the menstrual situation: people with yin deficiency may have more menstrual flow and longer periods. People with yang deficiency may have less menstrual flow and shorter menstrual period.
Therapeutic effect of traditional Chinese medicine: if the symptoms are improved when using traditional Chinese medicine for conditioning, it means that the body is in a state of yin deficiency. However, if the symptoms are not improved or aggravated after conditioning with traditional Chinese medicine, it means that the body is in a state of yang deficiency.
Dry mouth: people with yin deficiency are prone to dry mouth, while people with yang deficiency will not have symptoms of dry mouth.
Dietary preference: people with yin deficiency like to eat cold drinks, cold food, etc., while people with yang deficiency don't like to eat these foods.
Personality characteristics: people with yin deficiency are usually irritable and prone to lose their temper, while people with yang deficiency are gentle and good-tempered.
Appearance of complexion: people with yin deficiency have a flush and sweat easily, while people with yang deficiency have a pale face and are not easy to sweat.
Sleep situation: people with yin deficiency are prone to insomnia and dreaminess, while people with yang deficiency have better sleep quality.
Symptoms of diseases: people with yin deficiency are prone to get hot diseases, such as colds and fever, while people with yang deficiency are not easy to get these diseases.
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To sum up, it is necessary to comprehensively observe the symptoms and manifestations of yin deficiency or yang deficiency. If there are any obvious symptoms or manifestations, it is recommended to seek medical advice and treatment from Chinese medicine practitioners in time.