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.
Dental abscess A dental abscess, a severe tooth infection, can cause throbbing pain, swelling, redness, fever, and more. Canker sores Canker sore symptoms begin with a tingling sensation, followed by a red bump that becomes an ulcer. Salivary duct obstruction (sialolithiasis) Salivary duct obstruction can lead to swelling and pain, often under the tongue or jaw.