Small white worms in the poop of adults may be caused by pinworms, roundworms, hookworms and other diseases. 1. Pinworm disease: Pinworm disease is an infectious disease caused by pinworm parasites in the human intestinal tract, and patients will experience anal itching, loss of appetite, nausea, vomiting and other symptoms. If the patient is infected with pinworms, they may be discharged during defecation, resulting in the appearance of small white worms in the patient’s bowel movements. 2. Ascariasis: Ascariasis is mainly caused by the infection of roundworms, and the main symptoms of patients are abdominal pain, easy to hunger, malnutrition and so on. If the patient has ascariasis, the worms are discharged from the body during defecation, which will also lead to the appearance of small white worms in the feces. 3. Hookworm disease: Hookworm disease is caused by hookworm parasites in the intestinal tract, the patient’s main manifestations of dermatitis, cough, throat itching, mute, etc., but also diarrhea, epigastric discomfort, weight loss and other symptoms. When the hookworms are discharged with the feces, it will also cause the patient to have the manifestation of small white worms in the feces. When the patient has the phenomenon of small white worms in the stool, there may be other diseases, and should consult a doctor in time and follow the doctor’s instructions for treatment.