Should I use a dummy or let her suck her thumb?

[Olive]

sophie started sucking her thumb at the same age! i'm a dental nurse and as much as it concerns me LONGTERM for the moment i'm not worried at all! it's very natural comfort sucking, she self settles like a dream and wont even take a dummy, i'd leave her

ETA- hehehe sarah!!!!

Sophie sucks her thumb up the other way!! not sure why, seems uncomfortable if you ask me!!!