1. People who should not eat walnuts include those with yin deficiency and excessive fire, diarrhea, vomiting blood and nosebleeds.

2. Walnut is high in calories, rich in oil and has a strong "moistening intestine" effect, and it is not suitable for people with yin deficiency diarrhea.

3, walnuts are hot, eat more phlegm and reduce fire, so people who vomit blood and nosebleeds should eat less or eat quickly.

4. Eating too many walnuts will make you feel nauseous. In severe cases, there will be severe diarrhea and even watery stools, causing dehydration.