Dried ginger has the function of warming the middle and dispersing cold, returning yang to the blood vessels, warming the lungs and resolving drinks. For coldness in the hands and feet and coldness around the body caused by insufficient yang qi; for soreness, coldness and pain in the waist and knees or heaviness in the waist caused by insufficient yang qi to warm the internal organs, dried ginger can warm yang and improve these symptoms. For spleen and stomach deficiency cold, often poor appetite, nausea, vomiting, dried ginger also has the effect of improving the symptoms of spleen and stomach deficiency cold. Dried ginger can also improve coughing and coughing phlegm caused by insufficient yang energy, water and drink stopped in the chest and cannot be dissolved away, while the phlegm is clearer, dried ginger can dissolve the drink and stop the cough. However, dried ginger is not suitable for people with yin deficiency and fire, dry heat, or for people with yang constitution.