Infection with Trichinella spiralis may be asymptomatic, especially in light infections. Adults in the intestine may cause diarrhea, abdominal pain, and vomiting. Larvae moving into the tissues may cause facial swelling, fever, muscle pain, splinter hemorrages (under fingernails) or rashes.
Heavy infections may lead to heart
problems or central nervous system involvement. Large numbers of
larvae in other muscles may lead to soreness and weakness which often lessens