Diarrhea during cancer treatment: When to call
  Call 911 anytime you think you may need emergency care. For example, call if:
  - You passed out (lost consciousness).
  - You pass maroon or very bloody stools.
  
  Call your doctor now or seek immediate medical care if:
  - You are vomiting.
  - You have new or worse belly pain.
  - You have a fever.
  - You cannot pass stools or gas.
  - You have new or more blood in your stools.
  
 Watch closely for changes in your health, and be sure to contact your doctor if:
  - You have new or worse symptoms.
  - You are losing weight.
  - You do not get better as expected.