In stochastic processes, chaos theory and time series analysis, detrended fluctuation analysis (DFA) is a method for determining the statistical self-affinity of a signal.
Sore throats caused by tonsillitis or streptococcus may trigger a canker sore even after the initial throat condition has subsided. Also known as an aphthous ulcer, canker sores are painful and unsightly, but they are not contagious.
Answer Wiki. Typically not. A canker sore (aphthous stomatitis) is a temporary sore on the oral mucosa (mouth and tongue) that is of unknown origin. Despite many studies, the cause is not clear though factors like stress, hormones, fatigue, geneticsâ¦. can cause its appearance.