Introduction The brain is a complex organ that controls thought, memory, emotion, touch, motor skills, vision, breathing, temperature, hunger and every process that regulates our body. Together, the brain and spinal cord that extends from it make up the central nervous system,.Brain is one of the crucial organs of the human body.It controls cognitive, psychological, social and biological factors.There are nine most common complications of human brain.(1) Intelligence development disorder(2) Autism(3) Epilepsy(4) Cerebral palsy(5) Dementia(6) Cerebral vascular disease(7) Recurrent headache(8) Parkinson disease(9) Multiple SclerosisOther complications includes Meningitis, brain tumors and traumatic injuries.Let us briefly study each of these common complications.The