I touched a dishwasher detergent pod to put it in the dishwasher. a few minutes later i itched the inside of my nose slightly. could this be dangerous?

No worries: In the US, regulations and laws require potentially dangerous consumer products to be labeled as poisonous or toxic. Without such labeling, for most labeled products, you can assume contact isn't very risky. While you wouldn't want to swallow a large amount of detergent, contact with small amounts like this -- anywhere on your body -- is not likely to be harmful.