When they are present in large numbers, they can create enough blood loss to cause anemia or iron deficiency in some people.Constipation, Some worms can obstruct certain organs like the colon, liver and the bile duct, causing constipation and other problems.Diarrhoea, Most of the time diarrhoea is nature's way of removing toxins.Fatigue, Symptoms include tiredness, flue-like symptoms, apathy, depr