Basic rules of capitalization
Capitalize the first word of every sentence.
Capitalize the first word in an expression used as a sentence.
Really?
So much for that.
Enough said.
Congratulations!
Capitalize the first word of a quoted sentence.
His wife states that the last thing he said was, "The headache is gone."
The patient said, "The roads were icy and I lost control of the car."
Capitalize the first word of each item displayed in a list or an outline.
The patient displays the following symptoms:
1. Nasal congestion.
2. Cough.
3. Fever.
The patient listed the following complaints: headache, dizziness, intermittent fever.
Proper nouns
Capitalize every proper noun; that is, the official name of a person, place or thing. Trade names are proper nouns.
Vicodin
University of Illinois
Smithsonian Institute
Capitalize imaginative names and nicknames that designate particular persons, places or things.
the Founding Fathers
Mr. Nice Guy
the Middle Ages
Southern California
Ground Zero
the Whole Enchilada
Capitalize a location or department if it can be replaced with the name of a person (i.e., proper noun).
The patient will be seen by Dr. Jones in neurology.
The patient will be seen by Neurology.
The patient will be evaluated in the emergency room.
The Emergency Room will evaluate the patient.
Wiki