If the spinach is cooked and frozen after the deterioration occurs, and then eat easy to abdominal pain, diarrhea and other discomforts. But if not spoiled, generally no harm. Spinach is a common vegetable with certain nutritional value. From a nutritional point of view, 100g spinach contains 2.6% protein, 91.2% water, 2920mg carotene, 32mg vitamin C and other components. To determine whether it is harmful to eat spinach after blanching and freezing, it needs to be based on the actual situation, can not be generalized, mainly depends on whether it is spoiled. If spinach is spoiled after boiling and freezing, it is easy to have abdominal pain, diarrhea, nausea, vomiting and other symptoms after eating, causing food poisoning, acute gastroenteritis and other diseases. However, if the spinach is not spoiled after boiling and freezing, it is not harmful to the body, and moderate consumption can also supplement the nutrients contained in the body to help maintain normal physiological functions. To summarize, you should always keep the ingredients properly and try to eat fresh food. If you feel unwell after consuming spinach, you should go to the hospital.