6-Vomiting
One of the most impactful side effects caused by tumors in the stomach is a spike in the body’s inflammatory response. The gastric mucosa, also known as the stomach lining, will invariably become increasingly and as a consequence, patients are likely to experience vomiting and nausea.
Patients with stomach cancer are very likely to find blood mixed with the vomit. In cases where bleeding is severe, the blood will pass into the lower gastrointestinal tract and be excreted in the patient’s feces. In these cases, the stools turn tarry and have a black coloration due to the fact that the blood is partially digested on its way out of the body.
Again, as with other symptoms on this list, vomiting is not necessarily a sign of cancer as a plethora of other conditions may cause it. However, it can serve as an early warning sign that should never be ignored, especially if it cannot be easily attributed to other more benign causes.