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.
If you do not make enough saliva, your mouth can become quite dry. This condition is called dry mouth (xerostomia). Dry mouth causes the gums, tongue, and other tissues in the mouth to become swollen and uncomfortable. Germs thrive in this type of setting. A germy, dry mouth leads to bad breath.