What Are the Symptoms of Worms in the Human Body?
Intestinal parasites in the body are commonly caused by poor sanitation and hygiene, as well as international travel to locations where parasite infections are common. In some cases, worms may be spread through sexual intercourse when anal and oral sexual contact occur, according to Planned Parenthood. The two most common internal parasites are Helminths and protozoa. Both are worms and can live inside the human body for years without causing any symptoms.