Some symptoms of parasite infestation include diarrhea, fatigue, itchy skin, anxiety problems, sleep disturbances, loss of appetite, weight loss, anemia and muscle and joint complications. The five most common infections... More »

Human intestinal parasites are diagnosed through a number of ways including a stool sample, endoscopy or colonoscopy, blood tests and imaging tests such as an MRI, states the Centers for Disease Control and Prevention. T... More » Health Conditions & Diseases Gastrointestinal Issues

Some parasites that can live in humans are different types of worms and protozoa, as noted by the University of Maryland Medical Center. The types of worms, which can live in the gastrointestinal region, can include pinw... More » Science Biology

Early symptoms of liver problems include jaundice, abdominal pain, swelling, itchy skin, dark urine, fatigue, nausea, vomiting, loss of appetite, bruising easily, pale stool, and bloody or tar-colored stool, according to... More »

Some of the symptoms of having a tapeworm include nausea, abdominal pain, diarrhea, fatigue, weight loss, hunger or loss of appetite, according to WebMD. Often there are no symptoms of a tapeworm infection. More »

The common symptoms of an overactive thyroid are weight loss, increased appetite, irritability, rapid heart rate and anxiety, according to the Office on Women's Health, whereas underactive thyroid symptoms include weight... More »

Symptoms of a toxic liver can include jaundice (yellowing of the skin and eyes), itching, pain in the upper right abdomen, fatigue, loss of appetite, nausea and vomiting, weight loss and dark urine, says Mayo Clinic. Not... More »