What are the risk factors of brain abscess?

Condition analysis:
Hi. Could you elaborate upon the "hole in the brain" a little more ? And what was the diagnosis based upon?

There could be a number of possibilities (brain abscess, tumor, etc.) and almost all brain conditions have a headache. It would be better if you could describe it a little more.

Regards

Instructions:
What are the risk factors? Nearly anyone can get a brain abscess, but certain groups of people are at a higher risk than others. Some diseases, disorders, and conditions that raise your risk include:
a compromised immune system due to HIV or AIDS
cancer and other chronic illnesses
congenital heart disease
major head injury or skull fracture
meningitis
immunosuppressant drugs, such as those used in chemotherapy
chronic sinus or middle ear infections