How to deal with a 1-year old child who is overly sensitive? She cries so hard even if you just say NO to her wants in a calm tone of voice.

I won't call it sensitive. They are at a age of not being able to accept NO or rejection. They just wants things to go their way. Just be paitent about it. and spend a little more time explaining to her why it's a NO rather then a yes. Soon she will be able to understand why mommy says no too