It proposed that the brain and its contained blood are in compressible, confined within the nearly rigid skull, the total volume of which remains constant. Later, cerebrospinal fluid (CSF) was taken into account as another cranial compartment when the concept of reciprocal volume changes between blood and CSF was introduced by Burrows. The study conducted in patients coming to the Emergency Department with suspicion of raised Intra cranial pressure. Present study of 100 cases 44 patients were having vomiting,34 were having headache, 18 were having both vomiting and headache,only 4 cases were not having either headache or vomiting. In present study of 100 cases 91 cases were having normal fundoscopic study of them 77 were having raised ICP,and 9 cases were having papilledema on fundoscopy,all 9 cases were having raised ICP. In present study of 100 cases 21 were diagnosed as having CVA of them 18were having raised ICP,63 were arrived with RTA of them 56 were having raised ICP, meningitis were accounting for least number of cases those are 16 in number, of them 12 were having raised ICP.