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.
A sore throat can make it painful to swallow. A sore throat can also feel dry and scratchy, and may be a symptom of the common cold or other upper respiratory tract infection. The following symptoms are often associated with sore throats caused by a viral infection or due to allergies: Sneezing; Coughing; Watery eyes; Mild headache or body aches; Runny nose