Does she have any spots anywhere else? Only reason i ask is recently DS had a very similar thing as you have described and it ended up being Hand Foot & Mouth Disease. He had a few spots on his hands, and on his legs. Also had a fever and cold and flu symptoms before the rash broke out. The rash then turned crusty like.

Heres a pic of it https://www.bellybelly.com.au/forums...php?photo=7080

Hopefully its just dribble rash or something else. Nothing you can do for HF&M except wait for it to go. Although our doctor prescribed him some antibiotics for it incase there was some bacteria in it also.