What are some signs that someone has a healthy brain? and what are some signs that a person has a not healthly one needs to be investigated for something wrong?

Symptoms: Brain disorders are seldom without symptoms. Things to look for include: frequent headaches, sharp pain, changes in vision, speech, hearing or concentration, memory loss, dizziness, frequent falling or loss of coordination, mood swings, fatigue, problems sleeping or lack of appetite. Talk to your Dr at your next physical exam and let them know about any specific concerns and symptoms.