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Introduction: Acute subdural hematoma (ASDH) is the most common type of traumatic intra -cranial hematoma accounting for 24% cases of severe head injuries and caries highest mortality. The mortality rates are seen to be ranging from 40% to 90%, diagnosed on computed tomography (CT) as extra axial, hyperdense, crescent lesion between the Dura and brain parenchyma1. Acute SDH is an acute space occupying lesion to increase intracranial pressure (ICP), and is often complicated by co-existing intracranial lesions, including a variety of diffuse injuries, contusional hematomas, and edema. Acute subdural post-traumatic hematoma’s (SDH) continue to have a distressingly high morbidity and mortality.2 Clinical factors like presenting GCS, Pupils, time to operative interval, Hemodynamics and co-morbidities, plays a critical role in overall outcome from acute subdural hematoma.3Careful monitoring of the neurological status is mandatory even for selected acute SDH patients with intact consciousness and no brain shift because of the possibility of the unexpected worsening. Spontaneous resolution of an acute SDH has been reported in rare cases. We report a case series of spontaneous rapid reduction of acute SDH, also we discuss the prognosis of each patient according to a Clinicoradiological Prognostic Score developed by Gautam and Sharma3 as well as mechanisms related to the rapid resolution of acute SDH.