A small amount of bleeding within the posterior horn of the lateral ventricles bilaterally and no dilatation of the lateral ventricles is seen i.e. the amount of bleeding within the posterior horn of the lateral ventricles bilaterally is small and has not yet resulted in hydrocephalus, dilatation of the ventricles, etc. When the amount of bleeding in the posterior horn of bilateral lateral ventricles is large, it will lead to the obstruction of cerebral blood flow and cerebrospinal fluid circulation, which can lead to hydrocephalus, and at this time, it will lead to the expansion of the lateral ventricles, while when there is a small amount of bleeding in the posterior horns of the bilateral lateral ventricles, and the expansion of the lateral ventricles has not been seen, which indicates that the amount of bleeding is small, and has not led to hydrocephalus, etc., and the organism can still be absorbed on its own, so it does not need any special treatment, and it can be observed. When the patient has more bleeding in bilateral ventricles and the expansion of lateral ventricles is obvious, and the patient has headache, nausea and vomiting and other symptoms, the patient should go to the hospital in time to do further examination and treatment under the guidance of professional doctors.