From yesterday evening my daughter's molar teeth area started paining then we noticed that teeth is coming out she is having pain her upper lips is swollen and has a mild fever from night , she has a history of cavity in her upper front teeth area because she breastfeeds at night . Now I'm concerned that is the pain and fever due to cavity or molar teeth according to her when I ask her which area she paining she shows the molar teeth area. what to do plz suggest... how long will the pain remain