Watery stools with a fishy odor may be caused by intestinal flora dysbiosis, acute enteritis and other reasons, dietary adjustments, medication and other methods can be used. 1. Intestinal flora dysbiosis: intestinal flora dysbiosis leads to an increase in harmful bacteria and a decrease in beneficial bacteria, which can lead to the appearance of watery stools and fishy odor, avoid spicy and irritating foods such as chili peppers. You can avoid spicy and stimulating foods such as chili. You can take probiotics such as bacillus subtilis to regulate the intestinal flora. 2. Acute enteritis: acute enteritis due to bacterial invasion of the intestinal tract, destroying the balance of the intestinal environment, but also stimulate the intestinal tract, appearing watery stools, and fishy smell of the situation, you should eat less and more frequent meals; in severe cases, should be fasting. Medications should be administered, including montelukast to stop diarrhea, and antimicrobials such as norfloxacin and ciprofloxacin. In addition, if dehydration occurs, rehydration therapy is needed. Watery stools with a fishy odor may also have other causes, it is recommended to go to the hospital in time, under the guidance of the doctor, to carry out the necessary examinations and combined with the relevant medical history, to clarify the cause of the disease, to give targeted treatment or treatment. The medication should be used under the guidance of a professional physician, and should not be used arbitrarily.