If you display any of these warning signs, seek medical attention immediately.
- Vomiting blood.
- Vomiting food eaten hours or days before.
- Difficultly swallowing
- Nausea
- Black or tar-like stools (indication that there is blood in the stools)
- Sudden, severe pain in the abdominal area
- Pain that radiates to the back
- Pain that doesn't go away when you take medication
- Unintended weight loss
- Unusual weakness, usually because of anemia
