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.
More often, canker sores are caused by a tissue injury in the mouth or stress. Another canker sore cause is foods with a high citrus content such as oranges and tomatoes. Medical issues such as Celiac disease, Crohnâs disease, or an impaired immune system may also trigger canker sores to appear.Oral herpes is caused by a virus that is spread through body fluids.anker sores are caused by damage to the mouth, foods or an underlying disease, while oral herpes sores are caused by a virus. Eventually, cold sores will become crusted while canker sores will simply go away.