The main manifestation of mutism is silence, which can be long periods of time without talking or communicating with others, and is mainly seen in the following diseases: 1. More commonly seen in depressive mutism, depressed patients may have psychomotor retardation or even a state of rigidity when they are more serious, and at this time they may appear to refuse to drink, refuse to eat, or even lie in bed all day, motionless and speechless. 2. schizophrenic mutism, especially if the schizophrenic condition is more serious, with severe delusional symptoms, or if the schizophrenic condition is longer and already has negative symptoms as the main manifestation, it is very likely that the emotions are flat, or even the thinking is poor, not talking, not communicating with others, no emotional communication and other symptoms. 3. more common is hysterical mutism, especially when the hysteria attack The most common symptoms are hysterical mutism, especially when there is a hysterical attack, such as no speech, but writing and gestures are very quick, so we should consider whether it is a hysterical attack. 4, there may also be selective mutism in childhood, that is, some children may have no problem talking and communicating with others in certain situations, especially with acquaintances, but for other scenarios and objects, such as in unfamiliar environments and strangers, there is no problem. But for other situations and objects, such as in unfamiliar environments and strangers, the child does not say a word. The above-mentioned diseases are the common diseases of mutism, regardless of which state must be analyzed on a case-by-case basis to see what disease is causing the mutism.