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.
4. Salivary Gland Infection. Diseases and infections to the salivary glands may be the cause of the unnatural way your mouth tastes. Damage to the salivary glands can cause a decreased production of saliva, and oftentimes the increase of sodium and chloride in the existing saliva composition.