Even if you take a good insulin, you can’t eat at will, you usually still need to control your diet, you can’t just eat at will. Insulin is a kind of hypoglycemic drugs, mainly used to control diabetes and other diseases, diabetic patients through the way of insulin, can effectively promote the body’s blood sugar is absorbed by the tissues, and can regulate the patient’s body’s sugar, protein and fat metabolism, but also can reduce the level of glucose in the blood. However, the action of insulin usually needs to be regulated on the basis of dietary regularity, if the patient takes insulin and eats casually, it may lead to high and low blood glucose, and affect the effect of drug treatment. Insulin is contraindicated in hypoglycemia, insulin allergy; adverse reactions include local redness, itching, generalized rash, shortness of breath, hypoglycemia and so on. Insulin patients still need to maintain a balanced diet, generally do not recommend eating randomly, and patients should also avoid smoking and drinking and other bad habits. Pay attention to low-sugar diet, appropriate increase in exercise, regular monitoring of blood glucose, if there is any discomfort, consult a doctor in time.