 [ Symptoms ] i have an old filling that is wearing out and hurts when i eat is there anything i can do to delay refilling the tooth [ Disease ] unfortunately it is impossible to say what could be causing these symptoms since several conditions could be the culprit you should not ignore these symptoms however you should take your daughter to her pediatrician as soon as possible unexplained weight loss in an adolescent should never be ignored you would do well to take her to the doctor and have some tests run to find out what is causing this and the dizziness all the best to you both from personal experience  i would specifically ask the dr to check her thyroid levels i had those symptoms for years with no explanation until my 20 is when i was diagnosed with hypothyroidism another thing to consider is iron levels if she is starting puberty her levels could be all over the place causing her to be light headed also  one more thing  does she drink any diet drinks aspartame causes dizziness and light headedness for most of my family i would write those down to specifically ask the dr to check them <positive_smiley>