hi, thanks for post, well parasites can cause several symptoms in some areas of body, i'll give some of them, most common are gastrointestinal,
abdominal pain, pang,
food intolerance, vomits, diarrhea, nausea, flatulence, fullness, constipation, hematological are anemia ,
eosinophilia ;
vitamin deficiency , urticaria , fungal infections , dry skin , drooling , bruxism, anal itching, and other symptoms dependent of infested organs, not ever all this symptoms are present, but if you have your suspicion, must be tested not only for parasites but for other causes of your hassles.