体重无故减轻。如果没有大量运动、食欲改变,却明显消瘦,如体重减少5公斤以上应当心。反复呕吐、呕血、黑色大便。这类情况应警惕上消化道疾病。最常见的原因可能是十二指肠溃疡或胃溃疡等引发的出血。吞咽困难。如果吃固体食物时吞咽难,后来发展到吞咽液体食物也困难的话,要高度怀疑食管恶性肿瘤。贲门失弛缓症等食管良性疾病也会导致吞咽难。疲劳虚弱。当食欲不振,疲劳虚弱时,有可能是贫血,不能排除是消化道 Weight loss for no reason. If you do not have a lot of exercise, loss of appetite, but obviously wasting, such as weight loss of 5 kg or more should be careful. Repeated vomiting, hematemesis, black stool. Such cases should be wary of upper gastrointestinal diseases. The most common cause may be bleeding caused by duodenal ulcers or gastric ulcers. hard to swallow. Esophageal malignancies should be highly suspected if swallowing is difficult when eating solid foods and later when it is difficult to swallow liquid food. Cardiac achalasia and other esophageal benign diseases can also lead to swallowing difficult. Fatigue is weak. When loss of appetite, fatigue, there may be anemia, can not rule out the digestive tract