Whether or not it is normal for a man to be thin but have a large stomach depends on the cause of the symptoms. If it is caused by physiological reasons such as lack of exercise, it is normal; if it is caused by pathological reasons such as fluid accumulation in the abdominal cavity, it is not normal. If a man’s thin but large stomach is caused by physiological factors, such as the patient’s own fat distribution imbalance or lack of exercise caused by sedentary fat accumulation, and does not cause discomfort, will not affect the patient, then it is normal. If a man is thin but has a big stomach caused by pathological factors, such as fluid accumulation in the abdominal cavity and abdominal distension, it is an abnormal situation and may be a symptom of cirrhosis of the liver, heart failure, enteritis and other diseases. If you have uncomfortable symptoms, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or standardized treatment.