Vomiting blood - may be associated with gastric ulcers, some infectious diseases, acute poisoning or haemorrhagic gastroenteritis. This is a serious sign.
                                                            
                                                     
                        
                                                
                        
                        
                            Vomiting blood - may be associated with gastric ulcers, acute poisoning or severe infections. This is a serious sign.
                                                            
                                                     
                        
                                                
                        
                        
                            Blood in the vomit (also spelt hematemesis)