Diseases that occur in the head can be physiological, structural or psychological.
The brain contains an intricate system of cavities filled with cerebrospinal
fluid. It is constantly manufactured and reabsorbed. Changes in dynamics
of this system can lead to an accumulation of fluid or hydrocephalus.
Dementia can occur from hydrocephalus, especially one form of it,
NPH. Dementia can also occur from Alzheimer's disease and
certain types of brain tumors, such a meningiomas.
Tumors of the brain can produce headaches. Any part of the brain
may be affected, producing weakness, numbness, incoordination, speech
problems, visual problems and problems with mentation. Increased pressure
within the skull can lead to headaches, nausea, vomiting and coma.
The blood supply to the brain is composed of many interconnected vessels.
These help prevent strokes or limit their damage. Weakened areas
of the vesssels can balloon out and form aneurysms, that may rupture.
Alteration in the function of the brain can lead to depression, seizures,
dyslexia, and mental retardation.
The scalp and skull can form tumors. Hair loss occurs from a variety
of conditions. It may be treated with Rogaine and hair transplantation.
Headaches are one of the most common disorders. They can include stress
headaches, migraine headaches, cluster headaches, temporal arteritis,
meningitis, hydrocephals and brain tumors. One form of increased intracranial
pressure, pseudotumor cerebri, raises the pressure in the head
in the absence of a tumor.
Infection of the brain can occur from meningitis and encephalitis.
Unusual infections occur with HIV and some forms of cancer.