Cognition is the set of all mental abilities and processes related to knowledge, attention, memory and working memory, judgment and evaluation, reasoning and  computation , problem solving and decision making, comprehension and production of language, etc.
Less common causes. Less commonly, tongue pain may be caused by: a viral infection â such as an infection that causes hand, foot and mouth disease or cold sores. vitamin deficiencies and anaemia â a sore tongue can sometimes be a symptom of iron deficiency anaemia and vitamin B12 or folate deficiency anaemia.
Types and causes salivary gland disorders. These include: Salivary stones (sialoliths or salivary calculi). Salivary stones are crystallised mineral deposits that block saliva flow causing pain, swelling and lumps under the tongue. These are usually under 1 cm across but can be larger.