How to do you get rid of dry, itchy scalp. I have just moved to AZ. When I sweat it is worse.?

It could be for a number of reasons but natural remedies and oils such as lavendar, neem and rosemary oil are great for an itchy scalp. Could also be stress of a change and the move, since moving is one of the most stressful things you can do. Also alot of cheaper shampoos and conditioners contain chemicals which aren't good for an already, dry itchy scalp. SLS or sodium lauryl sulfate is an example of a chemical in shampoo that is also used in industrial products such as engine degreasers

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Could be one of several things: -

Contact dermatitis

Seborrheic dermatitis

Psoriasis

Head louse

Stress

Take a look at the link below for the various treatments

Head and shoulders should work, it should make the itching go away.