If the patient is suffering from yin deficiency and cold, he can take Dendrobium under the guidance of doctor. Dendrobium is sweet in taste, slightly cold in nature, and belongs to the stomach and kidney meridians. It has the effects of benefiting the stomach and generating fluids (nourishing the stomach by replenishing the fluids in the stomach), nourishing yin and clearing away heat (nourishing the yin essence and clearing away the heat evil). It is used for heat illness, dry mouth and thirst, deficiency of stomach yin (insufficient yin fluid in the stomach), dry vomiting with little food, non-resolving of deficiency heat after illness, yin deficiency and fire (deficiency of yin essence in the body, resulting in hyperactive deficiency fire), bone vapor and laborious heat, darkness of the eyes, and impotence of sinews and bones. If the cold belongs to the case of Yin deficiency cold, you can eat Dendrobium, or wind-heat cold with injury to Yin can eat Dendrobium. However, because of the cold nature of dendrobium, it is forbidden to take dendrobium for those who have not injured the yin in the early stage of warm-heat disease, those who have not been dry for wet-warm disease (warm disease caused by feeling dampness and heat), and those who have not been dry for spleen and stomach deficiency (spleen and stomach weakness and cold). If you need to take dendrobium when you have a cold, it should be used under the guidance of a doctor, and should not be taken blindly by yourself to avoid aggravating your condition.