The scientific name for potatoes is potato, a common ingredient that is beneficial in moderation, but has no medicinal value and cannot be applied externally to treat hard lumps from injections. Potatoes have a high water content of 79.8%, and their main nutrient content is carbohydrates, at 17.2%, which can be used as a source of high-quality carbohydrates. In terms of vitamins, potatoes have a high content of carotenoids at 30mg/100g, ranking high among similar foods. In terms of minerals, potatoes have a high potassium content of 342mg/100g, ranking high among similar foods. Moderate consumption of potatoes can replenish some of the nutrients needed by the body, but they should not be relied on alone to sustain daily activities, and patients are advised to eat a balanced diet. There is no research results show that potato has medicinal efficacy and role, so it can not be used for external treatment of injection hard lumps. It is recommended that patients who are not feeling well go to the regular hospital in time, and follow the doctor’s instructions for symptomatic treatment.