Stomach pain after eating black fungus may be caused by certain physiological factors, or it may be caused by allergies, food poisoning and other factors. 1. Physiological factors: eating too much black fungus takes a long time to digest, so the stomach and intestines will speed up peristalsis, during which gas will be produced, so there will be stomach discomfort, resulting in bloating, stomach pain and other manifestations. 2. Allergy: black fungus contains more protein and a variety of minerals and vitamins, etc., eat black fungus after stomach pain may be intolerant to some of the ingredients, resulting in an allergic reaction. This is often accompanied by obvious skin rashes, itching and so on. 3. Food poisoning: factors such as too long soaking time or too long storage time of the fungus may lead to microbial contamination, producing fatal toxins such as myrmecolic acid and toxanthin. In addition, black fungus is not clean, residual pesticides and other substances may also cause food poisoning. Stomach pain after eating black fungus may also be caused by accidental consumption of food that is repulsive to black fungus, such as quail and snails. For stomach pain caused by physiological factors, usually after rest can be relieved. If the symptoms are caused by physiological factors, it is recommended to consult a doctor in time to clarify the cause and follow the doctor’s instructions to standardize the treatment.