I just had some blood tests and my iron came back as 152. Last time it was 90. What could be causing this?

You will probably be best served by looking at these sites:

Hemochromatosis: Diagnosis - Treatment - Maintenance and Diet (http://www.ironoverload.org/)
Hemochromatosis (http://digestive.niddk.nih.gov/ddiseases/pubs/hemochromatosis/)
http://www.hemochromatosis.org/

You can also Google "hemochromatosis"

Let me google that for you (http://www.lmgtfy.com/?q=hemochromatosis)