My Kid Is Losing Weight — Should I Be Concerned?

Your child's weight loss simply might be from healthier eating and getting more exercise, as my daughter's was. However, certain illnesses, like Type 1 diabetes and other endocrine disorders, gastrointestinal disorders, cancer, infections, or kidney disease, along with certain medicines, can also cause weight loss. In general, it's a good idea to consult your pediatrician about any unexplained weight loss of more than a few pounds.