Level 1: Symptoms of teething in babies. Teething in babies is a problem faced by every family, but many parents do not know the symptoms of teething. Generally speaking, babies will experience increased drooling, biting fingers, biting hard objects, and decreased sleep quality. Some babies may also experience symptoms such as diarrhea and loss of appetite. Level 2: Why does teething cause fever? Many people know that teething in babies is accompanied by fever. This is because during the process of teething, the teeth will irritate the mouth and surrounding tissues, causing minor infection and inflammation, leading to an increase in body temperature. Level 3: How to