Rheumatic fever is a disease which causes fever, and swelling and pain in your joints.
rheumatic fever in British English
noun
a disease characterized by sore throat, fever, inflammation, and pain in the joints
rheumatic fever in American English
an acute or chronic inflammatory disease usually induced by a preceding infection with certain hemolytic streptococci, characterized variously by fever, pain and swelling of the joints, inflammationof the heart, etc., and typically occurring in children and young adults