rash around mouth

Tyaa

can someone tell me what this is and how to treat it? She has eczema on her hands and in the folds of her hands but she started getting a rash i was thinking from saliva and sucking her paci and hands but it seems like it has gotten worse. My little cousin put her candy in my baby’s mouth today also so i don’t know if it could be that or eczema... Someone help me bc i am freaking out and i just don’t wanna go to the doctor if it is eczema but idk !!!!!