1. Silkworm pupae can't be eaten without treatment and can never be cold. Silkworm pupae are black or pink, and can't be eaten with hemp or spicy taste. Silkworm pupae can not be eaten for a long time, more than one week in winter and more than 20 hours in summer.

2. Silkworm pupae will be contaminated by bacteria for a long time, so that they will deteriorate into poisonous pupae. Some silkworm chrysalis contain abnormal diseases spread by silkworm eggs and silkworm excrement, and eating this kind of silkworm chrysalis is easy to cause poisoning reaction. Although some poisonous bacteria, bacteria and parasites in silkworm chrysalis are not thoroughly treated, they can denature silkworm protein and decompose to produce toxins, which will be poisoned after people eat them, especially on an empty stomach. Silkworm pupa poisoning patients have symptoms such as nausea, vomiting and dizziness. In severe cases, mania, hallucinations, paroxysmal convulsions of muscles in neck, trunk and limbs, and even delirium, measles and anaphylactic shock occur all over the body;

3. So silkworm chrysalis should be eaten raw and processed. In case of silkworm chrysalis poisoning, you should be sent to the hospital quickly for treatment.