Symptoms of chronic gastritis can vary in severity and may include abdominal pain, bloating, nausea, vomiting, loss of appetite, and weight loss. In some cases, patients may experience bleeding in the stomach, leading to symptoms such as hematemesis (vomiting blood) or melena (black, tarry stools). However, some individuals with chronic gastritis may remain asymptomatic, making the condition harder to diagnose without specific testing.