A Carbon 13 test value of 30dpm usually indicates the presence of H. pylori infection. Whether a patient is serious or not cannot be judged by this one value, but also depends on the patient’s own condition. Carbon 13 test refers to the carbon 13 urea breath test, generally in the range of 0 to 4dpm is normal, while 30dpm usually represents the presence of H. pylori infection. Most infected people do not have obvious symptoms, and some patients may have symptoms such as bloating, belching, anorexia, and acid reflux. If the patient is not complicated by other diseases, it is usually not too serious and can be cured by standardized treatment. If the patient develops into peptic ulcer, gastric cancer, etc., it is more serious, and timely treatment is recommended to control the symptoms and improve the quality of survival. To sum up, it is not possible to judge the severity of the patient’s condition only by one indicator, and it should be judged according to the patient’s own condition, and it is recommended to actively seek medical treatment.