What are the causes for Dehydration in Children?

  • Dehydration is most often caused by fever, diarrhea, vomiting, and a decreased ability to drink or eat associated with a viral infection.
    • Common viral infections that cause vomiting or diarrhea include rotavirus, Norwalk virus, and adenovirus.
    • Sometimes sores in a child's mouth (caused by any several viruses) make it painful to eat or drink, which helps to cause or worsen dehydration.
  • More serious bacterial infections may make a child less likely to eat and may cause vomiting and diarrhea.
    • Common bacterial infections include Salmonella, Escherichia coli, Campylobacter, and Clostridium difficile.
  • Parasitic infections by Giardia lamblia cause the condition known as giardiasis , which can lead to diarrhea and fluid loss.
  • Increased sweating from a very hot environment can cause dehydration.
  • Excessive urination can be caused by unrecognized or poorly treated diabetes mellitus (not taking insulin) or diabetes insipidus.
  • Conditions such as cystic fibrosis or celiac sprue do not allow food to be absorbed and can cause dehydration.

    Source: http://www.emedicinehealth.com