In this article we will comment principal types of hair that exists:

Normal hair
The normal hair is a easily distinguishable type of hair. It has sheen, fluency, is easy to brush and has certain volume.
Dry Hair
Dry hair is that one that does not give a good sensation on having felt it, and, as the own word says, is dry. It is in the habit of being a type of fragile hair, which breaks easy, and does not have scarcely sheen.

The hair dries off, is dehydrated and becomes fragile as result of the lack of fat.
One of the most important enemies of this type of hair is the Sun, and of course, hair dyes.

Oily hair

This type of hair, is in the habit of being heavy, squashed hair, as consequence of an secretion excess of fat in the sebaceous glands. Besides, the hair is without force, without volume, falls down without forming either waves or curls.