I stuck my hand in a toaster oven (I know that was stupid) and I burnt my hand. It is a red line across my hand about 2 inches. How can I make it go away?

You can't make it go away right now.

You burned the skin and skin takes time to repair itself.

Did it blister?

No it didn't blister. There is just a red line.

There are various burn creams, that can be helpful

Also

Treatment of Minor Burns

First Aid Burn Treatment and Care Instructions for Minor Burns- MassGeneral Hospital


And just so you don't feel alone there are web sites about putting your hand in a toaster ( this should make us scared)

1. how long can you keep your hand in a toaster video
Hand Toaster - Flurl.com Video Search Engine

Reflective Design: Kitchen Appliances