scaly dry patches on skin?

I have some strange areas or patches of what appears to be real dry skin.  I cant tell if you would describe it as scaly or rash like.  Its not red but the areas are rough and looks like small tiny hard bumps patched together.  So far they are really only on my arms but I am concerned what they could be.  

Could it just be dry skin or does it sound like something more serious.

Thank you

[Dr Santos]

Hi,

Aside from xerosis or dry skin, other differentials include irritation, dermatitis or  eczema and conditions such as psoriasis and pityriasis rosea. Moisturizing helps with dry skin. However, if it persists, this may warrant further evaluation by your dermatologist for proper diagnosis.

Take care and keep us posted.

[B623]

Thanks so much for the help.  I hope its nothing too serious but I will be sure to get it checked out if it gets worse