My 7 month old granddaughter has underarm odor. Should I be concerned? She gets a bath every other day?

Sometimes babies have those little chubby roles around any areas that have creases. They end up getting red and irritated, which could cause an odor. My daughter had this under her chin (she's a little chub and has quite a chin, and it's really hard to get that area good and clean). The dr had me put 1% hydracortizone cream on it and it was gone within two days. This can happen when the area isn't washed well, or maybe is washed but isn't dried as well as it could be and a bit of moisture gets trapped. Check in those little folds and see if there is any red and moist irritation.