1, people who are allergic to ultraviolet rays, itchy skin or bloodshot eyes should avoid eating potatoes. Potato is a photosensitive food. When its photosensitive substance reaches a certain concentration in the body, the skin of exposed parts of the human body (face, hands and feet) will be exposed to direct sunlight, which can lead to metabolic disorders and dermatitis. This kind of dermatitis is medically called "vegetable solar dermatitis". The main manifestations are itching and burning sensation in local skin, and acute edema, ecchymosis or blisters with stinging pain can be seen. In severe cases, the lips, eyelids and face are swollen and purple. At the same time, it may be accompanied by headache, fatigue, fever, nausea, vomiting, loss of appetite and other systemic reactions. Therefore, people with this situation should not eat potatoes.

2. People with diabetes should not eat potatoes. Because potatoes are high-starch foods, their carbohydrates can be converted into energy (sugar) when absorbed by the human body, so diabetics should not eat potatoes.

3, people with spleen and stomach deficiency and cold should avoid eating more. Potatoes have a purgative effect, and those who are prone to diarrhea due to deficiency of spleen and stomach should eat less or not.

4. People who are allergic to potatoes should not eat potatoes. Potatoes may become allergens. If they are allergic to potatoes, eating potatoes may cause allergic symptoms such as skin redness, frequent diarrhea, indigestion, headache, sore throat and asthma. Therefore, such people should also avoid eating potatoes.

5, potatoes that have been put for a long time are not suitable for eating. Because potatoes contain alkaloids, the longer they are stored, the higher the alkaloid content of potatoes. Excessive consumption of potatoes stored for a long time can also cause solanine poisoning.

6. Germinated potatoes or potatoes are green and can't be eaten. Because this kind of potato contains toxicity, it will cause food poisoning.