This is a first for boh of us. I've never come even close to being
bitten, and Ingrid has always been very gentle, so I was startled when
she grabbed my hand in her mouth with a snap. Just now she's doing it
every time I go close to her stomach. The incision from being spayed
had been healing well (she's let me check her stomach before), but I
want to inspect to see if anything is wrong.

Any advice? I don't want to actually get bitten, but I don't want to
leave this because it seems like a problem.