Rhizome is rich in carbohydrates, vitamins, minerals and other nutrients, for the body to supplement nutrition and energy has a certain auxiliary effect, and in traditional Chinese medicine, rhizome and spleen, water, thirst, detoxification and other effects, although there is no clear clinical contraindication to the consumption of rhizome, but still need to pay attention to the following points: 1, allergy caution consumption: rhizome contains some specific proteins prone to allergies, if If the consumer is allergic to rhizome or belongs to the allergic constitution, it is not recommended to eat rhizome, so as to avoid skin rashes, swelling and pain and other allergic reactions after consumption; 2, avoid direct raw food: Although the flesh of rhizome can be eaten raw, but because rhizome is an aquatic plant so may be attached to many bacteria or parasites, raw food is easy to enter the body to cause diarrhea, fever and other symptoms, especially try to avoid directly using teeth Avoid directly biting the skin of the rhizome with your teeth. It is best to boil the rhizome, or the rhizome pulp peeled out after full drying, cleaning before consumption; 3, avoid excessive consumption: Chinese medicine believes that the rhizome is cold, excessive consumption may produce a certain stimulation of the gastrointestinal tract, resulting in abdominal pain, bloating, diarrhea and other gastrointestinal reactions, especially people with a weak spleen and stomach, but also to control the amount of consumption; 4, diabetes caution consumption: because the rhizome contains a large number of starch, in the body can be converted into sugar, so too much consumption of diabetic patients may cause blood sugar, aggravating the condition, it is recommended to choose to eat under the guidance of a doctor; 5, other: if the consumer has a cold cough, diarrhea and other diseases or is in the menstruation period, pregnancy and other special periods of women, it is recommended to eat rhizome under the guidance of a doctor, so as not to affect the body or aggravate the condition.