It is the process of the growth of the tumour in the brain. Of course the brain is the important part of the human body. If there is a tumour formed in the brain then the symptoms are headache, nausea and swelling due to the growth of the tumour. This is one of the deadliest cancers as the surge of the brain involves high complexity. The rate of people who have escaped from the brain tumour is very less. Moreover the surge is the option for this type of cancer yet surgery part is highly difficult as it might not be always effective. The causes for brain tumours are still not specific where the experts have proposed certain reasons such as cigarette smoking, inheritance, and radiation to heat, HIV and other environmental factors. The stages of the tumours are classified into grades from one to four depending upon the growth of the tumour cells.