Shidou is the tuber of potato, family Dioscoreaceae. It is cultivated throughout the country and the tubers are harvested in autumn. Alias: potato, taro, yam, yam eggs. Taste and smell: sweet, flat. Returning to the stomach and large intestine meridian. Efficacy: Beneficial to the qi and strengthen the brand, relieve acute pain, laxative stool. Indications 1, deficiency of the spleen and stomach after illness, shortage of breath and weakness. 100g of potatoes, 150g of beef belly tendon, 150g of soy sauce, 5g of sugar, onion and ginger, cooked and rotten to taste over moderate heat. 2, stomach yard pain. Fresh potatoes peeled and washed, chopped and mashed, squeezed juice with gauze wrap, add honey in appropriate amount, cooked, 1 to 2 spoons daily in the morning on an empty stomach, taken continuously for 2 to 3 weeks, avoid stimulating food during the serving period. 3, constipation. Potatoes, wash and peel, squeeze into a puree, then cooked over low heat, add the right amount of honey to serve. Clinical application 1, phlebitis. Wash the potato, rinse with sterile distilled water and then peel with a sterilized knife, cut into slices about 2mm thicker than the lesion, and apply to the lesion for 0.5 hours each time, 2 times a day for 6 days as a course of treatment. 2, skin ulcers. Potato slices cut into small pieces, processed into a mud, applied to the lesion, wrapped with gauze or bandages, replaced 2-4 times a day, dressing about 15 days the wound can be healed, this method is also effective for the treatment of intramuscular injection caused by hard knots. 3, burns. Wash the potato, add water and boil for 20 minutes, peel the potato skin of the same size as the wound, apply to the wound, fix with sterile bandage, and use for 3-5 days. Can also be used after grinding potato juice, applied to the burns, can be anti-inflammatory pain. 4, mammary gland hyperplasia. Take about 200g of potatoes, wash and cut thin slices, external application on the affected breast, external application area more than 2cm above the affected area, covered with plastic film on the outer layer of potato slices, and then fixed with adhesive tape, 2 times a day, 4 days before the menstrual period began to external application (or breast pain when the external application began), 7 days for a course of treatment, and used for 3 menstrual cycles. Note: People with a weak spleen and stomach and prone to diarrhea should eat less. Sprouted potatoes are not suitable for consumption because they contain a large amount of lobeline, which can cause poisoning.