Most cases of Sydenham chorea can be prevented by early diagnosis and prompt treatment of streptococcal infections, such as strep throat.
Sydenham chorea usually has no long term effects, and generally clears up on its own. It may take several weeks to 3 months for this chorea to improve. This condition occasionally lasts 6 to 12 months.
Sydenham chorea itself is not contagious. However, the streptococcal infection that caused the infection is contagious.