It takes about 1-2 months for a brain hemorrhage of 20 ml to be completely absorbed, because a brain hemorrhage of 20 ml exists mainly in the form of a blood clot in the cranium in the early stage, and the blood clot gradually evolves into a liquid hematoma after about two weeks, and the blood is gradually metabolized and absorbed after about 1-2 months in the later stage. A brain hemorrhage of 20 ml is usually cured by conservative treatment, and the patient may experience slight limb dysfunction. However, it is also necessary to pay great attention during the treatment period, because with the further development of the disease, it may lead to an increase in hematoma or significant cerebral edema. Therefore, active hospitalization is required for all patients who develop cerebral hemorrhage, and the length of hospitalization usually takes at least about two weeks.