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From your description, your 17 month old daughter may well have oral thrush. It is typically characterized by white or yellow patches or bumps on the oral tissues. A mild fever can accompany oral thrush on occasion. And it can be contagious if you are nursing. It can also cause discomfort if the infection is present in the baby's esophagus.
A noticeable "smell" of her breath is also consistent.
If she is also teething, this, of course can cause irritabilitiy separately. An infection on her gums other than thrush is unlikely in a 17 month old. The white area may simply be the appearance of the gum tissue during eruption.
I would recommend that you take her to a pedodontist first, as this is somewhat more within the specific oral / dental realm. He may suggest seeing a pediatrician, but the pedodontist is likely the best place to take her first.
Please let me know if you need additional information to answer your question. Otherwise I'd appreciate a positive rating for my effort. That is how I am paid for my work here.
No problem - I completely understand. I'm here on the East coast. I answered your question because when I awoke I saw that it went unanawered through the night. Save the $36. I hope your daughter is comfortable and 100% very soon.
Feel free to ask if you have any future dental or oral health related questions in the future.